Make tool failures actionable with suggestions and scope hints.

Unregistered tools now suggest close matches; MCP insufficient_scope is rewritten with fallbacks so ops agents stop blind-retrying SQL without sql:query.

Co-authored-by: Cursor <cursoragent@cursor.com>

runtime/chat/agent.py

@@ -95,8 +95,14 @@ class Agent:
         t0 = time.perf_counter()
         tool = self.tools.get(tc.name)
         if not tool:
-            msg = f"Unregistered tool: {tc.name}" if self.lang.startswith("en") else f"未注册的工具: {tc.name}"
-            return {"ok": False, "error": msg}, int((time.perf_counter() - t0) * 1000)
+            from runtime.tools.tool_error_hints import format_unregistered_tool_error
+
+            available = [t.name for t in self.tools.list()] if hasattr(self.tools, "list") else []
+            return format_unregistered_tool_error(
+                str(tc.name or ""),
+                available,
+                lang=str(self.lang or "zh"),
+            ), int((time.perf_counter() - t0) * 1000)
 
         ok, v_err = validate_tool_arguments(tool.parameters, tc.arguments)
         if not ok:

runtime/chat/tool_runtime.py

@@ -534,8 +534,14 @@ class ToolExecutor:
 
         tool = ctx.tools.get(tc.name)
         if not tool:
-            msg = f"Unregistered tool: {tc.name}" if ctx.lang.startswith("en") else f"未注册的工具: {tc.name}"
-            return {"ok": False, "error_code": "tool_not_registered", "error": msg}, int((time.perf_counter() - t0) * 1000)
+            from runtime.tools.tool_error_hints import format_unregistered_tool_error
+
+            available = [t.name for t in ctx.tools.list()] if hasattr(ctx.tools, "list") else []
+            return format_unregistered_tool_error(
+                str(tc.name or ""),
+                available,
+                lang=str(ctx.lang or "zh"),
+            ), int((time.perf_counter() - t0) * 1000)
 
         from runtime.tools.context_inject import enrich_tool_arguments
         from runtime.tools.tool_validation import filter_arguments_to_schema

runtime/tools/mcp/adapter.py

@@ -127,6 +127,9 @@ class _McpBoundTool:
                 return {"ok": False, "error_code": "mcp_runtime_invalid_payload", "error": "invalid_response"}
             if "ok" not in res:
                 res["ok"] = False
+            from runtime.tools.tool_error_hints import enrich_mcp_scope_error
+
+            res = enrich_mcp_scope_error(res)
             if tool_name == "listCliTargets" and res.get("ok") is not False and cache_key:
                 _set_list_cli_cache(cache_key, res)
                 res = dict(res)

runtime/tools/tool_error_hints.py

@@ -0,0 +1,100 @@
+from __future__ import annotations
+
+import difflib
+from typing import Any, Iterable
+
+
+def suggest_tool_names(requested: str, available: Iterable[str], *, n: int = 5) -> list[str]:
+    """Suggest close tool names for unregistered-tool errors."""
+    name = str(requested or "").strip()
+    pool = [str(x).strip() for x in available if str(x).strip()]
+    if not name or not pool:
+        return []
+    # Prefer substring matches (mcp__netx__foo vs netx__foo / queryUmeAlarmsRaw).
+    low = name.lower()
+    substr = [p for p in pool if low in p.lower() or p.lower() in low]
+    close = difflib.get_close_matches(name, pool, n=max(n, 8), cutoff=0.45)
+    out: list[str] = []
+    for x in substr + close:
+        if x not in out:
+            out.append(x)
+        if len(out) >= n:
+            break
+    return out
+
+
+def format_unregistered_tool_error(
+    tool_name: str,
+    available: Iterable[str],
+    *,
+    lang: str = "zh",
+) -> dict[str, Any]:
+    suggestions = suggest_tool_names(tool_name, available)
+    if str(lang or "").startswith("en"):
+        err = f"Unregistered tool: {tool_name}"
+        hint = (
+            "Use one of suggestions, or refresh MCP tools for this specialist."
+            if suggestions
+            else "Tool is not in the current registry; check MCP enablement / specialist binding."
+        )
+    else:
+        err = f"未注册的工具: {tool_name}"
+        hint = (
+            "请改用 suggestions 中的工具名，或检查该专家的 MCP 绑定/启用状态。"
+            if suggestions
+            else "当前工具目录中无此工具；请检查 MCP 是否启用及专家绑定。"
+        )
+    out: dict[str, Any] = {
+        "ok": False,
+        "error_code": "tool_not_registered",
+        "error": err,
+        "hint": hint,
+    }
+    if suggestions:
+        out["suggestions"] = suggestions
+    return out
+
+
+def enrich_mcp_scope_error(result: dict[str, Any]) -> dict[str, Any]:
+    """Rewrite insufficient_scope MCP errors into actionable ops guidance."""
+    if not isinstance(result, dict) or result.get("ok") is not False:
+        return result
+    err = str(result.get("error") or "")
+    code = str(result.get("error_code") or "")
+    blob = f"{err} {code}".lower()
+    if "insufficient_scope" not in blob and "insufficient_scope" not in err:
+        return result
+    scope = ""
+    marker = "insufficient_scope:"
+    if marker in err:
+        scope = err.split(marker, 1)[1].strip().split()[0].strip("\"'")
+    elif marker in code:
+        scope = code.split(marker, 1)[1].strip()
+    out = dict(result)
+    out["error_code"] = "insufficient_scope"
+    if scope:
+        out["required_scope"] = scope
+    out["error"] = f"insufficient_scope:{scope}" if scope else "insufficient_scope"
+    if scope == "sql:query":
+        out["hint"] = (
+            "Current netx token lacks sql:query. Prefer aggregateUmeAlarms / queryUmeAlarmsRaw / "
+            "ume_alarm_xlsx_report; ask an admin to grant sql:query only if SQL is required."
+        )
+        out["fallback_tools"] = [
+            "mcp__netx__aggregateUmeAlarms",
+            "mcp__netx__queryUmeAlarmsRaw",
+            "ume_alarm_xlsx_report",
+        ]
+    else:
+        out["hint"] = (
+            f"Current netx token lacks scope {scope or '(unknown)'}. "
+            "Ask an admin to grant it on the netx API token, or use tools that do not need this scope."
+        )
+    return out
+
+
+__all__ = [
+    "enrich_mcp_scope_error",
+    "format_unregistered_tool_error",
+    "suggest_tool_names",
+]

skills/_workspace/ops/ops-netx-ume-playbook/SKILL.md

@@ -78,7 +78,9 @@ description: 面向 ops 专家的 netx UME 运维作业手册。覆盖告警查
 - 体积：`page_size` 默认 50；聚合 `top_ne` 默认 50；raw 用 preset；动态聚合 `limit≤200`。
 - **Top 网元**：默认忽略 `(host_name missing)`；结论中说明 missing 数量，勿把 UUID/`unknown`/空串当网元名。
 - SQL：建议 `statement_timeout_ms=8000`；非 `count(*)` 应带过滤；时间窗相对 **数据新鲜度**，不是盲目 `now()`。
+  - 若返回 `insufficient_scope:sql:query`：改用 `aggregateUmeAlarms` / `queryUmeAlarmsRaw` / `ume_alarm_xlsx_report`，勿盲重试 SQL。
 - `WITH` CTE 可用；**禁止** `WITH RECURSIVE`。
+- `getManagedNe` 只要 **纳管 ne_id**（来自 listManagedNe）；UME UUID 用 `getUmeNe` / `execManagedNe(ume_ne_id=...)`。
 
 ## 输出约定
 

tests/test_tool_error_hints.py

@@ -0,0 +1,38 @@
+from __future__ import annotations
+
+from runtime.tools.tool_error_hints import (
+    enrich_mcp_scope_error,
+    format_unregistered_tool_error,
+    suggest_tool_names,
+)
+
+
+def test_suggest_tool_names_prefers_substring() -> None:
+    pool = [
+        "mcp__netx__queryUmeAlarms",
+        "mcp__netx__queryUmeAlarmsRaw",
+        "mcp__netx__aggregateUmeAlarms",
+        "write_xlsx",
+    ]
+    hits = suggest_tool_names("mcp__netx__queryUmeAlarmsRaw", pool)
+    assert "mcp__netx__queryUmeAlarmsRaw" in hits or "mcp__netx__queryUmeAlarms" in hits
+
+
+def test_format_unregistered_includes_suggestions() -> None:
+    out = format_unregistered_tool_error(
+        "mcp__netx__queryUmeAlarmsRaw",
+        ["mcp__netx__queryUmeAlarms", "mcp__netx__aggregateUmeAlarms", "ume_alarm_xlsx_report"],
+        lang="en",
+    )
+    assert out["error_code"] == "tool_not_registered"
+    assert out.get("suggestions")
+    assert any("queryUmeAlarms" in s for s in out["suggestions"])
+
+
+def test_enrich_mcp_scope_sql() -> None:
+    raw = {"ok": False, "error_code": "mcp_rpc_error_-32001", "error": "insufficient_scope:sql:query"}
+    out = enrich_mcp_scope_error(raw)
+    assert out["error_code"] == "insufficient_scope"
+    assert out["required_scope"] == "sql:query"
+    assert "fallback_tools" in out
+    assert "ume_alarm_xlsx_report" in out["fallback_tools"]