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

readOnlyHint=true already establishes the safety profile, so the description's job is to add beyond that — and it does, disclosing that this is a partial projection (clients, notes, form answers, private URLs omitted). That is meaningful behavioral context an agent can't get from the schema, though it doesn't cover error behavior for an invalid ID.

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?

Two sentences, no waste, with the identification mechanism front-loaded and the field-projection caveat immediately after. Every clause carries 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 output schema, the description usefully characterizes the return payload by naming what is included and, more concretely, what is omitted. Complete enough to call correctly; a note on behavior when the ID doesn't exist would close the remaining gap.

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% and the schema only names the field "id", but the description clarifies it is a numeric locationId, resolving the ambiguity about which entity's ID is expected. It doesn't add format or lookup semantics beyond that, but for a single required param that clarification is the key gap filled.

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?

States a specific verb and resource ("Read one scheduling location by its numeric locationId"), and the word "one" implicitly distinguishes it from timetap_list_locations. It doesn't name that sibling explicitly, so the differentiation is inferred rather than stated.

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?

"by its numeric locationId" implies the precondition that you already have an ID, which is useful usage context. There is no explicit when-to-use / when-not guidance pointing to timetap_list_locations for discovery or to the appointment/service/staff getters, so the agent must infer the routing.

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