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

Annotations already declare readOnlyHint=true, openWorldHint=false, and destructiveHint=false, so the safety profile is covered. The description adds only that results come from an "official directory," a useful source-authority note, but it discloses nothing about result cardinality, ordering, or what an unfiltered call returns, which matters since no parameters are required.

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?

One sentence, front-loaded with the verb and resource, then the filter scope. Every clause carries information and nothing is padded or repeated.

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 two-parameter, read-only, non-destructive lookup with full schema coverage, this is close to sufficient. The main residual gap is that there is no output schema and the description does not sketch what a result contains or how many come back, plus the unspecified behavior when called with no arguments.

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 100%, so both parameters are already documented including example location formats like 'Denver' and 'Weston, Florida'. The description merely restates the same two filters and adds no new semantics, such as whether location matches city, state, or both, or how the filters combine.

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 pairs a specific verb ("Searches") with a specific resource ("the official directory of Pilates+ certified instructors") and states the two available scopes: city/state or online. That is enough to separate it from verify_pilates_plus_instructor semantically, but it never names the sibling or explicitly contrasts lookup vs verification.

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 only implied: the agent can infer it should call this when it needs to locate instructors, and the two filter modes suggest when each param applies. There is no explicit statement of when to prefer this over verify_pilates_plus_instructor, no mention of what happens if both filters are omitted, and no exclusions.

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