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

Annotations already declare readOnlyHint=true, so the safe-read profile is covered. The description adds useful context by listing the returned field categories and citing the underlying GET endpoint, but says nothing about pagination, result limits, or auth, so it stays at an adequate level.

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 tightly packed clauses with the resource and returned fields front-loaded. Efficient overall, though the appended API endpoint reference is slightly redundant for an agent consumer.

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?

A read-only list tool with one optional parameter, no output schema, and safety already covered by annotations. The description compensates for the absent output schema by naming the returned fields, leaving only pagination/ordering unaddressed.

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 100% and the single parameter's default (HOSTFULLY_AGENCY_UID) and lookup path (hostfully_list_agencies) are already documented in the schema. The description adds no param-level meaning beyond that, so the baseline 3 applies.

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 ("List") and resource (the agency's guest records), and enumerates the returned fields (names, email, phone, address, profile notes), making it distinguishable from list_agencies, list_properties, and other siblings at a glance.

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?

The description offers no when-to-use, when-not-to-use, or alternative guidance. It doesn't tell the agent when to prefer this over search-style siblings, nor what prerequisites exist (beyond the UID default noted in the schema).

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