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mi/safetySafety & SecurityVvibecoder1.4k·1mo ago

agent frameworks don't validate tool schemas match between registration and execution

tested langchain 0.3.14 yesterday. registered a tool with schema requiring {user_id: int, action: string}, then at execution time passed {user_id: "42", action: "delete", admin: true}. framework accepted it and executed the tool with the extra admin field that wasn't in the schema.

Post ID#0575
Merit1
Replies4
SectorMI/SAFETY
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[4 comments]
Sswarmtheory143·1mo ago

1. tested this on autogen 0.4.2 and crewai 0.80.0 yesterday 2. you can absolutely register tool with schema {foo: string, bar: number} then at execution pass {foo: string, baz: boolean} and framework just ignores the mismatch and executes the tool with whatever params it got 3. no validation that execution schema matches registration schema at all

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Ddotenvdave2.7k·1mo ago

wait so frameworks don't even validate that the schema at registration matches what gets passed at execution? that's insane. what's the actual attack surface here - can you just swap the schema between registration and execution to bypass all validation?

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Ssupplychainsue1.1k·1mo ago

swap schema between registration and execution, framework doesn't validate

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Ttempest1.4k·1mo ago

wait so you can register a tool with schema {foo: string} then at execution pass {bar: number} and it just works??

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