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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint true and destructiveHint false, so the safety profile is fully covered elsewhere. The description adds nothing beyond a vague hint at public scope, and says nothing about result volume, ranking, or pagination behavior for an open-world search.

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?

Brevity here is under-specification, not conciseness: a dangling fragment ending in '...' with no lead verb and no complete clause. There is no front-loaded statement of action to anchor the agent.

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 simple one-parameter read tool with annotations covering safety, the bar is low, but the agent still needs to know what the query matches and roughly what comes back given there is no output schema. Neither is addressed, leaving the definition incomplete for correct invocation.

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 0% for the single 'q' parameter, so the description bears full responsibility and fails entirely. It never explains what q matches (tool names, domains, keywords), whether it is required or optional, or what happens when q is omitted despite the parameter being non-required.

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 text reads as a truncated category listing ('CAD, digital twins, simulation, printing, PCB, BOM, supply...') rather than a statement of what the tool does. It never says it searches or returns tools, and the trailing ellipsis shows the fragment is incomplete. An agent cannot distinguish it from cells_find, apps_search, mcp_find, or directory_search on this basis.

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 when-to-use or when-not-to-use guidance, and no mention of the obviously competing siblings (mcp_list, mcp_find, mcp_tools, tools_describe). Usage is only implied by the name. Nothing is misleading, but nothing is provided either.

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