sign_message

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

No annotations are provided, so the description carries the full disclosure burden. It reveals that this is a certificate-based signing operation for authentication, but it does not state what the tool returns, in what format, or any error/prerequisite behavior.

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 two tight sentences: the first states the core operation, the second adds the relevant firmware/authentication context. There is no filler or repetition.

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?

For a single-parameter tool, invocation is mostly clear, and the auth purpose is helpful. However, with no output schema and no annotations, the description omits what the signing returns, which an agent would need to properly complete an authentication flow.

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 coverage is 100% and the schema already describes 'message' as the payload to sign with the X.509 private key. The description reinforces the authentication context but adds no new parameter-level details such as encoding, size limits, or format requirements.

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 opens with a specific verb ('Sign') and resource ('a message'), names the exact credential (Bambu Lab X.509 certificate), and explains the authentication purpose. This clearly distinguishes the tool from the printer/cloud sibling operations.

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?

It gives a concrete use condition: authenticate with printers running firmware that requires certificate-based auth (post-January 2025). No alternative signing tool exists among siblings, so the context is clear even without explicit 'when not to use' guidance.

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