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fix(tools): filter self and cls parameters from @beta_tool schema generation #1128

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fix(tools): filter self and cls parameters from @beta_tool schema generation #1128

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9 changes: 9 additions & 0 deletions src/anthropic/lib/tools/_beta_functions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -155,6 +155,15 @@ def kw_arguments_schema(
if not properties or not is_dict(properties):
return schema

# Filter out 'self' and 'cls' parameters for class/instance methods
for param_name in ("self", "cls"):
if param_name in properties:
del properties[param_name]
# Also remove from required if present
required = schema.get("required")
if required and isinstance(required, list) and param_name in required:
cast(list[str], required).remove(param_name)

# Add parameter descriptions from docstring
for param in self._parsed_docstring.params:
prop_schema = properties.get(param.arg_name)
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