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

No annotations are provided, so the description carries the full burden, and it discloses nothing: not whether matching is case-sensitive, regex vs literal, per-line vs whole-text, or what is returned. For a 4-parameter tool with zero structured behavioral coverage this is a severe gap.

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?

It is short, but the brevity is degenerate repetition rather than useful compression — the second clause adds zero information beyond the first. This is under-specification, not conciseness.

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 4 parameters, no annotations, no output schema, and no usage context, the description is completely inadequate for an agent to invoke the tool correctly. Nothing about behavior, input roles, or return format is recoverable.

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 nominally 100%, but the schema text is boilerplate filler ('Text to process', 'Input to process', 'Search to process', 'Pattern to process') that conveys no meaning. The description offers nothing to disambiguate the overlapping 'text' vs 'input' vs 'search' vs 'pattern' parameters, so the coverage number overstates the actual semantic clarity.

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 is a verbatim restatement of the name: 'Line Contains: Line Contains.' It states no resource, no scope, and no verb beyond the token already in the tool name. It does nothing to distinguish this tool from the hundreds of sibling string predicates.

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?

There is no guidance whatsoever on when to use this tool, when not to, or which alternatives (e.g. x402-grep-lines, x402-words-containing, x402-find) apply. The agent must infer everything from the tool name alone.

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