Compare crypto implementations

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description must carry the full transparency burden. It discloses that executions happen in 'separate bounded Workers', which implies isolation and resource limits. However, it does not mention failure modes, return format, or security implications beyond that. It adds some value but leaves many behavioral aspects unclear.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, well-structured sentence that front-loads the core action and quickly conveys key details (inputs, worker isolation, comparison). Every word earns its place, with no redundancy or tangential information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

This is a code-execution tool with 5 parameters, no output schema, and no annotations. The description covers the high-level purpose but omits critical contextual details such as the return value format, how functionName is invoked, input encoding requirements, and error handling. It is insufficient for a tool that runs user-supplied code in a potentially security-sensitive manner.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It mentions 'two supplied implementations' (mapping to code1 and code2) and 'identical inputs' (mapping to testInputs), but does not explain functionName or timeoutMs. The description adds minimal meaning beyond the schema's field names, providing only partial guidance.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states a specific action ('Run two supplied implementations against identical inputs'), identifies the resource ('two supplied implementations'), and the output ('compare outputs'). This distinguishes the tool from siblings like crypto_test_harness, which likely tests a single implementation.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage context (comparing two implementations in separate Workers), but it does not explicitly state when to choose this tool over alternatives such as crypto_test_harness or provide any exclusions. The usage is clear from the action, but no explicit guidance is given.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.