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

Annotations already declare readOnlyHint=true, so safety is covered by structured data. The description does add a genuinely useful trait beyond annotations — a fixed page size of 25 — plus the underlying endpoint. It says nothing about ordering, whether all contacts across all businesses are returned, or whether filtering is possible.

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 short clauses, front-loaded with the verb and resource, with the page size and endpoint trailing. Efficient; the raw endpoint path is of marginal value to an agent but takes almost no space.

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 simple read-only list tool with one optional parameter, full schema coverage and no output schema, so the description needn't explain return fields. The page-size and pagination hint makes it callable; only the absence of ordering/filtering scope keeps it from being fully complete.

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?

With a single parameter at 100% schema description coverage, the schema already explains the 1-based page number and the total-page reply. The description only adds the page size, which helps interpret pagination but does not otherwise add meaning beyond the schema.

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: 'List the contact persons of business customers.' That distinguishes it from ezrentout_get_business_contact (single contact) and ezrentout_list_businesses (the businesses themselves), though it never names those siblings explicitly.

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?

No guidance on when to choose this over ezrentout_list_businesses or ezrentout_get_business_contact, and no prerequisites or scoping conditions are given. The intended use is only inferred from the wording.

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