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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds only the shape of what is inspected (deprecated operations plus sunset announcement status), and says nothing about determinism, how 'going quiet' is detected, or behavior on malformed input. Adequate but thin against an already-informative annotation set.

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, front-loaded with the action and scope. The closing line is persuasive framing rather than operational content, but it is brief and does not bury anything important.

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 read-only analysis tool with no output schema, the description conveys the subject of the report (deprecated operations and their sunset signaling) clearly enough to set expectations. It omits output format and any notion of sorting or grouping, which is a minor gap given the annotation coverage.

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 100% and both parameters are documented in the schema itself, including a detailed note that 'context' is never returned or used for ranking. The description adds no parameter meaning beyond that, so the baseline 3 applies.

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 verb ('Report') and a tightly scoped resource ('every deprecated operation and whether it actually announces a sunset'), which is narrow enough that an agent can separate it from broad audit siblings like api_coverage or governance_report. It never names or contrasts a sibling explicitly, so it stops short of a 5.

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?

There is no when-to-use instruction, no prerequisites, and no named alternative among the many governance/audit siblings (api_scorecard, governance_report, diff_api_versions). The second sentence ('The ones that go quiet are the ones that break consumers') is motivation for caring about deprecations, not guidance on when to invoke this tool versus another.

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