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

With no annotations, the description carries the full disclosure burden, yet it omits auth requirements (an access_token param exists), pagination behavior, and what the return shape looks like. It only discloses the 100-item cap, leaving the mutation-free read semantics and access constraints unstated.

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?

A single tight sentence with the key filtering capability front-loaded and no filler. The cryptic 'PRO.' fragment is the only wasted element.

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 4-parameter tool with no output schema, no annotations, and 25% schema coverage, the description leaves required-param behavior, auth, and return format unexplained. An agent cannot confidently call this correctly without guessing.

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 coverage is only 25%, so the description must compensate; it adds an example format for 'forms' and the implicit 100 cap on 'limit', which is genuinely useful. However, the required 'company' parameter and the access_token auth flow are left undocumented in both places.

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: retrieves recent filings for a company filtered by form types. The example ['8-K','10-Q'] makes the filtering intent concrete and distinguishes it from the sibling latest_filings, though the unexplained 'PRO' prefix adds noise rather than clarity.

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 indication of when to use this over latest_filings or red_flags, no prerequisites, and no exclusions. 'PRO' hints at a tier restriction but is never explained, so an agent gets no actionable routing guidance.

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