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

Annotations already declare readOnlyHint=true, so the safety profile is covered. Description adds that entries contain guidance and that the intended follow-up is resolve_rejection, but it does not explain what the list contains beyond 'DECLINED' or any limitations, so it's minimal.

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, front-loaded sentence: 'Owner's DECLINED list — check at session start; follow each entry's guidance, then resolve_rejection(title).' Every phrase serves a purpose and no redundant information is present.

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 simple list tool, the description provides purpose and usage, but it ignores the project_id parameter and doesn't describe the output format. Since there's no output schema, the description should explain what the list contains; it only says 'DECLINED list' and 'each entry's guidance', leaving some ambiguity.

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 has one optional parameter project_id with no description, and the description never mentions it. With 0% schema coverage, the description leaves the parameter's meaning entirely to inference, failing to add value.

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?

Description identifies the tool as 'Owner's DECLINED list' and ties it to a session-start check, making the resource and action clear. The reference to resolve_rejection distinguishes it from related list tools like get_inbox.

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?

Explicitly instructs to 'check at session start' and provides the workflow 'follow each entry's guidance, then resolve_rejection(title)', giving clear when-to-use context. Does not compare with alternatives but the directive is unambiguous.

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