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

No annotations are provided, so the description carries the full behavioral burden, and it discloses nothing: not whether the result is an index, boolean, or list; not ordering or duplicate-handling behavior; not performance characteristics. This is a mutation-free read tool, but the agent has no idea what it actually does at runtime.

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?

Extremely short, but the brevity reflects under-specification rather than economy — the single duplicated phrase earns nothing and leaves the agent without actionable 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?

With no annotations, no output schema, and two undocumented parameters, the description should be doing all the explanatory work and instead does none. An agent has no basis for calling this correctly versus any of its hundreds of siblings.

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 descriptions are vacuous boilerplate ("Target to process", "Values to process") that never reveal that 'target' is the needle and 'values' is the haystack, or their expected format. The description contributes zero additional meaning, so the baseline 3 does not apply here.

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 pure restatement of the tool name ("Linear Search: Linear Search") and adds no verb+resource specificity. It hints at an algorithm genre but never states what is searched for, in what, or what is returned, so an agent cannot distinguish it from the sibling x402-binary-search beyond the name alone.

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 on when to use linear search versus the many sibling search tools (x402-binary-search, x402-search, x402-find). No prerequisites, no input-size guidance, no exclusions are offered.

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