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

readOnlyHint=true already tells the agent this is a safe, non-mutating operation. The description adds useful behavior beyond that — the match field (name and description) and the empty-q default — but omits result shape, result limits, and pagination behavior.

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?

Three tight sentences with no filler, and the parameter semantics are stated plainly. It opens with a domain inventory rather than the core purpose, so the key action is slightly less front-loaded than it could be.

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 one-parameter, read-only lookup with no output schema, the description gives the agent enough to call it correctly: what is searched, what fields match, and what an empty query returns. The main missing piece is what a result record looks like, which is not covered by any structured field.

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 0% and the single parameter q has no schema description, so the description must carry the semantics — and it does: it defines the matching model (words match name and description) and the empty-value behavior (lists all). This adequately compensates for the missing schema documentation, though it says nothing about multi-word or partial-match treatment.

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?

Names a specific verb (search) and resource (the public ce-net tool registry / 'cells'), and enumerates the covered domains (CAD, digital twins, PCB, BOM, etc.), so the agent knows exactly what corpus is searched. It does not explicitly contrast itself with the similarly named siblings apps_search or twins_search, which keeps it from a 5.

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?

Usage is implied by the semantics given ('words match name and description; empty q lists them all'), which tells the agent how to query but not when to choose this over apps_search or twins_search. No explicit when-to-use or when-not-to-use framing.

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