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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is covered. With no output schema, the description usefully fills that gap by describing the return payload structure and the meaning of the `planned` field. 'No parameters' is a minor restatement of the schema rather than added behavior.

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 sentences, return contents stated first, then the routing condition. The backticked field name and the parenthetical about register_feature_interest are compact and load-bearing; no filler.

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 zero-parameter, read-only discovery tool with no output schema, the description supplies both the return shape and the invocation context, which is close to sufficient. It is slightly thin on output scale or freshness (how large the catalog is, whether docs URLs are current), but nothing prevents a correct call.

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. The description confirms the no-argument nature explicitly, aligning with the empty object schema, and adds nothing that could mislead about inputs.

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 names a specific verb and resource ('Returns an overview of Overfit') and enumerates exactly what the payload contains: products, typical requests mapped to the answering tool, documentation URLs, and the `planned` feature list. That makes it trivially distinguishable from every sibling, which are all domain lookups (tenders, companies, deadlines) rather than a self-describing catalog.

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?

It states explicit trigger conditions: ask-what-Overfit-offers, ask-what-is-planned, ask-where-the-docs-are. It also routes the follow-up correctly by noting that interest in a planned feature is recorded via register_feature_interest. It stops short of naming a when-not case, but the trigger list leaves little ambiguity.

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