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

Annotations already declare readOnly=true, idempotent=true, non-destructive, and openWorld, so the safety profile is fully covered. The description adds only the scope ('all security checks'), with no mention of expected latency, rate limits, whether checks run in parallel, or what a 'comprehensive' result contains.

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?

Two short sentences, front-loaded with the action and scope, with zero redundant filler. Nothing could be removed without losing information.

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-parameter, annotated, open-world scan tool this is nearly sufficient — the agent knows what it does and that it's safe and read-only. The only real gap is that with no output schema, the description doesn't hint at what categories of findings come back or how long the scan takes.

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 description repeats the accepted target types (URL, domain, IP, email) verbatim from the schema's parameter description. No additional semantics such as format expectations, validation rules, or examples are added beyond the schema.

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+resource (run all security checks on a target) and quantifies scope with 'all' and 'most comprehensive', which lets an agent infer this is the superset of the single-type sibling checks (check_url, check_domain, check_ip, check_email). It stops short of naming those siblings explicitly, so differentiation is implied 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?

'Most comprehensive scan' hints at when to prefer this over the granular checks, but never states the tradeoff (breadth vs. speed/cost) or when NOT to use it. An agent must guess whether to call full_scan or a targeted check_* tool.

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