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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is covered. The description adds one genuine behavioral constraint — it will not 'invent semantic change or materiality' — which is useful, but it says nothing about cost, latency, or how the bounded filing/limit caps affect results.

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?

A single front-loaded sentence with no filler, and the key constraint is placed at the end where it lands. It is dense and slightly abstract but nothing is wasted.

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?

An output schema exists, so return values need not be described, and the read-only annotations cover the risk profile. What remains thin is operational context: how the bounded forms/filings/limit caps shape output and when this tool beats its siblings, leaving it only minimally viable for an 8-parameter 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 description coverage is 100% across all 8 parameters, so the schema already carries parameter meaning (q, item, forms, section, history, etc.). The description adds no syntax, defaults, or interaction details beyond what the schema documents, making baseline 3 the correct score.

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 specific verb ('organize ... chronologically') and resource ('filing evidence ... across a bounded set of SEC filings'), which is enough to distinguish it from search_evidence or compare_filings. It does not name or contrast the closest siblings (build_disclosure_lineage, build_disclosure_matrix, build_evidence_pack), so it stops short of a 5.

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 exclusion or alternative named. 'Across a bounded set of SEC filings' hints at scope but leaves the agent to infer when a chronological timeline is preferable to the lineage, matrix, or evidence-pack tools.

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