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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the description adds value by disclosing staleness ('numbers are as saved at created_at') and what the projection omits: screenshots, notes, raw extraction, internal metadata. That prevents an agent from expecting fresh or raw data. It does not say what happens when no saved analysis exists, which is the main behavioral gap.

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 first sentence front-loads the action and the sequencing hint, and the remaining sentences each add distinct information (staleness, field semantics, omissions). The captainDecisionPoints sentence is dense jargon but is tied to a concrete field name, so it earns its place.

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?

No output schema exists, so the description must carry the return-value burden; it does so partially by naming the excluded fields and clarifying the armband score, but it never sketches the shape of the returned projection or the empty-state behavior. For a no-arg read tool this is adequate but not complete.

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?

Zero parameters, so the baseline is 4; there is nothing for the description to disambiguate. The account scoping is implicit ('authenticated account'), which is consistent with the empty schema.

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?

States a specific verb and resource ('Read the latest saved analysis for the authenticated account') plus the temporal scope ('latest saved'). The phrase 'before requesting a fresh run' implicitly separates it from the run_fplai_analysis sibling, so an agent can distinguish it from get_fplai_analysis (a specific saved analysis) without opening schemas.

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?

Gives a clear usage context: call this before requesting a fresh analysis run, i.e. check cached results first. It does not explicitly name run_fplai_analysis or state when-not to use it (e.g. when a fresh run is already warranted), which keeps it 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.