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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so safety is covered. The description adds only a pointer that describe_operation supplies native request schemas, which hints at a two-step proxy workflow but says nothing about response shape, filtering behavior, or scope of the returned labels.

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?

The same endpoint string appears twice in a row, which is pure duplication; the one non-redundant clause (describe_operation pointer) is buried at the end rather than front-loaded as the operational instruction an agent needs.

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 proxy-style GET with a nested free-form query object, no output schema, and no annotations beyond read-only, the description is far too thin: it never explains the query structure, the expected response, or the relationship to describe_operation and execute_read.

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% for both the free-form 'query' object and the empty 'params' object, so the schema provides no semantics. The description only notes that describe_operation holds the native request schemas, which is a useful pointer but does not document what the two parameters accept or how they are structured.

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 is essentially the endpoint string 'GET /api/settings/module-labels' repeated verbatim, plus an operation ID. It restates the name/title without explaining what module labels are or how this differs from siblings such as get_settings_field_labels or get_settings_module_settings.

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?

There is no statement of when to call this versus alternatives. The generic sibling set (describe_operation, execute_read, search_operations) implies a proxy pattern, but the description never tells the agent whether it must first call describe_operation or whether this tool is directly invokable.

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