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

Annotations already provide idempotentHint=true, destructiveHint=false, and openWorldHint=true. The description adds useful context about the live feed, normalization for agents, and the $0.01 x402 payment requirement. However, it does not explain the implications of readOnlyHint=false for a tool that ostensibly only returns data, nor the payment challenge flow.

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 core purpose. The price and operation_id sentence are useful but partially duplicate the schema's own description of `_salt19_operation_id`, so the structure is good but not maximally tight.

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?

With no output schema, the description should explain what shape the normalized filings take, but it only says 'normalized for agent consumption.' It also omits `limit` semantics and provides no differentiation from sec-company-facts. The price and source are helpful, but significant context an agent needs to invoke this correctly is missing.

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 60%, and the two undocumented parameters include `limit`, which has no schema description and is not mentioned in the tool description. The description adds some semantic context for `cik` ('company CIK') and repeats the operation_id recommendation, but it does not compensate for the missing guidance on `limit`.

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 a specific action ('Return'), a specific resource ('recent SEC EDGAR filings for a company CIK'), and a source ('live SEC submissions feed'). It does not explicitly contrast with the sibling tool sec-company-facts, so it stops short of a full 5, but the resource type is specific enough for an agent to form an initial expectation.

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 guidance about when to choose this tool over sec-company-facts or other SEC-related tools. The description mentions price and an optional operation ID, but does not state conditions, exclusions, or alternatives.

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