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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive), and the description adds substantial behavior beyond them: the exact verdict enum and the conditions for meets_threshold (complete scan, <=90 days, no critical finding), the meaning of unknown, the data source (automated static signals from a bounded snapshot), and explicit limitations (not a certification, deterministic rules can miss things).

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?

Front-loaded with the call directive, then the verdict semantics, then the scope/disclaimer. Every sentence carries signal and nothing is redundant, despite covering four verdict states and a caveat in a compact block.

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?

There is no output schema, so the description carries the return-value burden and does so fully by enumerating and explaining all four verdicts and their pass/fail implications. For a two-parameter, read-only lookup, nothing needed to call it correctly is missing.

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% for both parameters, so the schema already documents repo_key and min_score's default (70) and BBB band. The description reinforces min_score as the pass gate but adds no syntax or format detail beyond the schema; 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 gives a specific verb and resource (verify an agent's trust) and frames it as a gate to call before delegating or invoking an agent. It is clearly a verdict tool rather than a retrieval tool, though it never explicitly names or differentiates itself from the sibling get_agent_report, so a reader must infer the boundary.

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?

"Call this before delegating work to, or calling, an agent" gives a clear triggering condition and timing. However, it offers no exclusions or explicit pointer to when a sibling like get_agent_report should be used instead.

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