feat(pydantic_ai): add PYD-013, ambiguous tool name

pydantic_ai/tool_definition.yaml

@@ -62,3 +62,34 @@ rules:
       list[str], a Pydantic model, etc.). Pydantic AI propagates these
       annotations into the schema the model sees, so the model emits
       correctly-shaped arguments and validation stops rejecting them.
+
+  - id: PYD-013
+    title: Ambiguous Pydantic AI tool name
+    severity: low
+    confidence: 0.9
+    language: python
+    applies_to:
+      - pydantic_ai_tool
+    scope: tool
+    match:
+      name_in:
+        - process
+        - handle
+        - run
+        - do
+        - execute
+        - perform
+        - work
+        - go
+        - thing
+        - stuff
+    explanation: >
+      The tool name is a generic verb that says nothing about what the tool
+      acts on. The name sits directly beside the description in what the model
+      sees, so it is half the selection signal, and a name like process or
+      handle spends that half on nothing — the model either calls the tool for
+      the wrong job or passes over it entirely. Pydantic AI derives the tool name from the function name unless one is passed explicitly, so a generically named function silently becomes a generically named tool.
+    fix: >
+      Rename to a verb-object form that names the thing acted on:
+      summarize_invoice, refund_charge, fetch_order_status. Keep the
+      description for the detail and let the name carry the subject.