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

With no annotations, the description must fully disclose behavior. It only says 'Retrieve' which implies a safe read, but it does not describe the output format, pagination, rate limits, or any other behavioral traits. Additionally, the claim 'based on filing dates' conflicts with the input schema, which only includes symbol and cik with no date parameters, creating confusion.

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 description is short and front-loaded with the main purpose. The second sentence is somewhat fluffy ('Stay current with the latest filings and track regulatory updates effectively') and adds little concrete information, but overall it remains concise.

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?

The tool lacks an output schema and annotations, and the description fails to explain what 'detailed disclosures' means, how CIK interacts with symbol, or how filing dates factor in given the schema. This is insufficient for an agent to use the tool correctly, especially given the conflicting date mention.

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 100%, so the baseline is 3. The description does not add any extra meaning beyond the schema's simple descriptions of 'Fund symbol' and 'Optional CIK number.' It even introduces a misleading date-based concept not reflected in the parameters.

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 clearly states the action ('Retrieve detailed disclosures') and the resource ('mutual funds and ETFs'), making the core purpose understandable. However, it does not differentiate from sibling tools like getFundDisclosure or searchFundDisclosures, which likely perform similar retrieval functions.

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?

The description provides no explicit guidance on when to use this tool versus alternatives. It only says to 'stay current with the latest filings,' which is a vague goal rather than a specific use case or exclusion criterion.

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