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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds genuinely useful behavior beyond that: large bodies are truncated server-side, which tells the agent output may be incomplete, plus the upstream source. It does not say how many filings are returned, whether all or only the latest, or in what order.

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 compact sentences, front-loaded with the resource and its scope, followed by the truncation caveat and source. No filler. The parenthetical source citation is borderline but justified for provenance-sensitive financial data.

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 must carry the return-shape burden, and it does partially by naming the content types (MD&A, risk factors) and warning about truncation. It omits coverage scope (all filings vs. most recent, date range, number of documents returned), which matters for a filing-history 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?

Schema coverage is 100% for the single rssd_id parameter, so the schema already carries the semantics. The phrase 'for one bank's registrant' reinforces that the id selects a single institution rather than a holding company or peer set, but adds little beyond the schema's 'Federal Reserve RSSD id.'

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 names the resource specifically: per-filing 10-K/10-Q narrative text blobs (MD&A / risk factors) scoped to a single bank's registrant, with the source (SEC EDGAR) stated. An agent knows exactly what it retrieves. It stops short of differentiating from the sibling filing_sections, which likely returns the same filings split by section.

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 explicit when-to-use guidance and no mention of alternatives, even though filing_sections and filing_velocity appear to cover overlapping territory. The agent must infer that this tool is for reading raw narrative prose rather than structured sections or filing metadata.

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