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

Annotations already carry the safety profile (destructiveHint=true, idempotentHint=true, readOnlyHint=false), so the bar is lower. The description adds real value by disclosing that a decline counts as a response and that nothing is matched or logged, which tells the agent about downstream side effects. It does not, however, describe what is returned or any irreversibility beyond the annotation.

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?

Two short sentences, no filler, and the key instruction ('decline with your own key') is front-loaded. It is efficient, though the second sentence reads as a fragment rather than a complete clause.

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 destructive, parameterized mutation with no output schema and no annotation-level return info, the description should say more about what happens after the call. It covers the 'nothing is matched or logged' side effect but leaves the response shape and any recovery path unstated; adequate but with 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 coverage is 67%, so most parameters are documented in the schema already. The description's 'with your own key' gestures at agent_key but adds no syntax, precedence, or default details beyond the schema; proposal_id and reason are untouched. Marginal value over structured fields.

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's core is 'Decline with your own key,' which restates the name without naming the resource being declined (the title supplies 'intro or proposal' but the description itself does not). It is distinguishable from siblings by the word 'decline,' but a reader of the description alone gets only a vague sense of the operation.

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?

No guidance on when to use decline versus the sibling tools accept, like, or pass, even though these form an obvious decision set. The only contextual note ('declining counts as a response') is about semantics, not about tool selection.

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