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

With no annotations, the description carries the full burden and does reasonably well: it discloses the reply shape (a one-line answer plus its date), that rows link to their filings, the source (SEC EDGAR), and licensing terms. It does not state auth requirements or latency/freshness beyond 'this week', but the read-only, non-destructive nature is clear from context.

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 scoping question is front-loaded and the whole definition is short with no filler. The telegraphic fragments ('Charter Amendments. SEC 8-K Item 5.03 · articles, bylaws, fiscal year · renames flagged.') are information-dense but read as staccato keyword dumps rather than prose.

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 single-optional-parameter lookup with no output schema, the description supplies the source, temporal coverage, return shape, and license, which is enough to call it correctly. Minor gaps remain around row semantics (e.g. what a 'charter amendment' entry contains) and update cadence.

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% and the single 'limit' parameter already documents default 50, ceiling 200, and the total/returned/truncated plus `more` link behavior. The description adds nothing about the parameter, so the baseline 3 applies.

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 states a specific subject (public companies that changed name, charter or bylaws) and scopes it temporally ('this week'), which is enough for an agent to tell it apart from get_mergers or get_agreements. It never names a sibling tool explicitly, so differentiation is inferred rather than stated.

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?

The framing 'Answers: Which public companies changed their name, charter or bylaws this week?' implies the query this tool satisfies, and the SEC 8-K Item 5.03 / articles, bylaws, fiscal year line hints at coverage. There is no explicit when-not-to-use guidance or routing to any of the many sibling lookup tools.

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