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

No annotations are provided, so the description carries the full burden. It only says 'Normalize' without disclosing whether this is a read-only transformation, how normalization behaves, what inputs are actually used, or any limitations. The behavior remains opaque.

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 concise sentence that front-loads the main purpose without fluff. It could be slightly more illustrative, but it is appropriately sized for a straightforward tool description.

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 an output schema present, the description does not need to explain return values. However, it gives no guidance on how the tool routes among siblings or what 'normalized' output looks like, leaving an agent to infer the full context from the name and schema.

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 partial (67%), with ticker and period already described in the schema. The description adds only a loose 'recent' connection to the period parameter and says nothing about limit, so it does not meaningfully compensate for the undocumented limit parameter.

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 concrete action ('Normalize') and a specific resource ('Form 4 insider transactions and transaction codes'), which clearly distinguishes it from sibling tools focused on financials, company snapshots, or material events. It is not a tautology and gives an agent a solid idea of what the tool does.

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 description implies the tool should be used when recent, normalized insider-transaction data is needed, but it does not explicitly state when to prefer this tool over siblings like latest_filings or what_changed, nor does it mention exclusions or conditions.

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