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

Annotations already cover the safety profile (readOnly, idempotent, openWorld, non-destructive), so the bar is lower, and the description still adds a genuinely important disclosure: the data is HackerOne-only and other platforms are deliberately excluded. This coverage-gap caveat is real behavioral context not captured in annotations, though return format and whether missing platforms would error vs. be omitted remain unspecified.

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?

Front-loaded with the core purpose in the first clause, followed by a single caveat sentence. The platform justification is somewhat verbose but earns its place by explaining a non-obvious limitation.

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?

Given a one-param, read-only list tool with no output schema and full annotation coverage, the description is essentially complete: it defines the scope, the unit of time, and the platform-coverage limitation. Only the result shape is unaddressed, which is minor here.

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 'days' param is self-documenting. The description restates the lookback window but adds no syntax, bounds, or default nuance beyond what the schema already provides, so 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?

States a specific verb (launched) and resource (bug-bounty programs) with a precise scope (last N days, by real launch date). Distinguishes itself implicitly from bounty_programs_search by focusing on recency rather than query, though it never names or contrasts those siblings directly.

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 recency framing implies when this tool fits, but there is no explicit when-to-use versus bounty_program or bounty_programs_search, and no stated exclusions or prerequisites. Usage must be inferred from the scope alone.

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