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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint=false, so the safety profile is covered. The description adds one useful caveat ('No live execution model'), clarifying these are approximate/static figures rather than execution simulation, but says nothing about data freshness, coverage limits of 'blind spots', or response 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?

Three short clauses, front-loaded with what is returned and immediately followed by the key limitation and the alternative. It is economical, though the telegraphic 'headlines'/'blind spots' phrasing borders on cryptic rather than crisp.

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?

Placeholder-free items.

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% and the single optional cik parameter is fully documented in the schema, including its effect of returning one filer's full free row instead of the all-filer headline. The description adds no parameter-level detail beyond that, so the baseline of 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 names the resource ('watched-filer headlines') and the content of those headlines (effective positions, days-to-exit brackets, blind spots), so the agent can infer it reports exit-feasibility for watched filers. But there is no clear verb and no differentiation from close siblings like exit_cost or trade_safety_exit_context, leaving the exact operation ambiguous.

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?

It implies a usage split by noting 'No live execution model' and pointing to 'unwind_stress' for 'full scenario grids', which suggests this is the lightweight headline view. However, unwind_stress is not among the listed sibling tools, and no explicit when/when-not condition or alternative among actual siblings is given.

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