get_13dg_ownership_changes

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

No annotations provided, so description carries full burden. Clearly describes what is returned: reporting person, ownership percentage, purpose, filing dates, SEC links. Explains form types and amendments. Lacks details on rate limits or authentication, but sufficient for behavioral understanding.

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?

Well-structured with headings and bullet points. Front-loaded with summary. Every sentence adds value, but slightly longer than necessary; could be more concise without losing clarity.

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?

Despite no output schema, description adequately covers return values and filing types. For a tool with 4 parameters and moderate complexity, the description is complete and leaves no major 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 100%, and description adds significant meaning: explains formType enum values ('13D' vs '13G' vs 'both'), activistOnly flag, and default values. Provides context beyond schema, e.g., 'activistOnly: returns only activist investors with multiple 13D filings'.

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?

Description explicitly states it tracks major ownership changes (5%+ stakes) from SEC Schedule 13D and 13G filings. Distinguishes between 13D (activist intent) and 13G (passive ownership), and provides clear use cases. Differentiates from sibling tools like get_13f_institutional_holdings or get_insider_trades.

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?

Provides concrete use cases (e.g., 'Show me recent 13D filings', 'Who filed 13D for Tesla?'). Explains when to use each form type. Does not explicitly state when not to use, but context makes it clear.

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