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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, openWorldHint=true, so the safety profile is covered. The phrase 'without inventing semantic change or materiality' adds a genuine behavioral constraint (the tool orders evidence but does not infer causation). However, the description says nothing about the bounded-filings limit behavior or output ordering guarantees, and no output schema exists to carry the return shape.

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?

One dense sentence with no filler, and the key constraint ('chronologically') is front-loaded. It is efficient, though a second short sentence clarifying the boundary against sibling timeline-like tools would have paid for itself.

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 an 8-parameter read-only tool with no output schema, the description covers the core concept but omits return shape, how 'bounded set' controls output size, and how to pick it over the three other build_* siblings. Adequate but with clear gaps.

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 63%, above the low-coverage threshold, so the baseline of 3 applies. The description adds 'bounded set of SEC filings' which loosely relates to the filings parameter (default 3, max 6) but does not explain it; parameters like limit, history, and item are left entirely to the schema.

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 clear verb ('Organize') and resource ('filing evidence') with a scope constraint ('chronologically across a bounded set of SEC filings'). It distinguishes from sibling build_disclosure_lineage and build_disclosure_matrix only implicitly by the word 'chronologically' — an agent might need to open those schemas to know which to choose.

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?

No when-to-use, when-not-to-use, or named alternatives. The description says what it does but gives no condition that would select it over build_disclosure_lineage, build_disclosure_matrix, or build_evidence_pack, all of which are similarly named sibling builders.

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