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

No annotations are provided, so the description carries the burden of transparency. It discloses the returned data (filing dates, effectiveness dates, CIK numbers, form types, SEC links), which helps predict output. However, it doesn't mention pagination, date-range behavior, authentication, or explicitly confirm read-only status, leaving some gaps.

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 concise sentences, front-loaded with the core purpose and using no filler words. The first sentence states the tool's scope, and the second adds valuable output details, making every sentence purposeful.

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 simple two-optional-parameter read API with no output schema, the description covers what the tool returns and its domain. The main gaps are not clarifying how from/to relate to 'upcoming' IPOs and not mentioning pagination, but overall it is sufficiently complete for an agent to select and invoke the tool.

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?

The input schema fully documents both parameters (to, from) with descriptions 'End date' and 'Start date', so schema coverage is 100%. The description adds no extra parameter semantics, but the baseline of 3 is appropriate since the schema handles parameter documentation.

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?

Description opens with a specific verb and resource: 'Access a comprehensive list of disclosure filings for upcoming initial public offerings (IPOs)'. It clearly names the FMP IPO Disclosures API and focuses on IPO-specific filings, distinguishing it from generic disclosure tools like getDisclosure or fund disclosure tools.

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?

Provides clear context for use: staying updated on IPO regulatory filings. It does not explicitly name alternatives or state when not to use this tool, but the 'upcoming IPOs' scope gives strong guidance for selecting it over siblings like getIPOProspectuses or getFilingsByFormType.

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