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

The annotations only indicate readOnlyHint=false, so the description's explicit 'WRITES: this call changes stored state and is not safe to repeat blindly' adds meaningful behavioral context beyond the structured data. It also explains the effect on the public log and the non-status nature of the entry. This is strong but not exhaustive, missing details like idempotency consequences across repeated calls.

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 core purpose is front-loaded and the WRITES warning is useful, but the description includes ornate metaphorical language ('The door calls declining a real position...') that adds little practical value. It is concise overall but could be tightened without losing meaning.

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 write operation with no output schema, the description covers the main behavioral implication and log effect. However, it leaves the 'secret' parameter unexplained and does not mention whether authorization or prior state is required. The description is adequate for a simple tool but has clear gaps.

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 only 50%; the description helps with 'reason' by noting it is optional, at most 240 characters, and published in the log line, but it says nothing about the 'secret' parameter, leaving its purpose and constraints completely opaque. That is a significant gap given the low schema coverage.

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 states a specific action and resource: recording that you considered binding a key and declined it. It also clarifies the durable semantic ('dated boundary in the public log, never a status'), which helps distinguish it from revocation or binding operations, though it does not explicitly name sibling tools.

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 clear trigger for use: when you considered binding a key and declined it. It also explains that this is not a permanent status and that binding later is allowed, which guides the agent toward safe usage. It does not enumerate exclusions or compare directly with alternatives, so it falls just short of a 5.

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