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

With no annotations, the description carries the full burden; it usefully discloses that authentication is required and where to obtain a key. However, it says nothing about whether the operation is read-only, what fields a filing has, rate limits, or what happens when no id is given.

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 with zero filler, and the purpose statement is front-loaded ahead of the auth note. It is efficient, though the brevity comes at the cost of substance rather than being trim-but-complete.

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 one-optional-param read tool with full schema coverage and no output schema, the description covers the auth prerequisite but omits what a "filing" is, what status values are returned, and the list-vs-single behavior nuance. Adequate but with clear gaps.

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% — the single optional id parameter is fully documented in the schema ("Filing ID (optional). Omit to list all your filings."). 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?

States a vague verb ("Check") against a resource ("your filings"), which roughly matches the name but never mentions "status" — the actual resource the tool retrieves. It also gives no signal to distinguish it from the sibling file_story.

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?

No when-to-use guidance, no conditions for choosing this over file_story, and no explanation of when a filing id should be supplied versus omitted. The only context offered is an authentication prerequisite, not usage direction.

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