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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds nothing beyond that — no return shape, no pagination, no scoping behavior for what is presumably a collection endpoint.

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 single sentence is duplicated verbatim, which is pure waste rather than front-loaded structure. It is short, but the content is redundant operation-ID boilerplate.

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 nested, free-form query object with zero schema descriptions and no output schema, the description should explain what query parameters are available or expected. Instead it defers entirely to describe_operation, leaving an agent unable to call it correctly without a second tool.

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 0% and the two parameters are an unconstrained free-form `query` object plus an empty `params` object, so the schema explains nothing. The description's only compensation is pointing at describe_operation for native schemas, leaving the actual query semantics undocumented here.

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 restates the name/title ("GET /api/recurring-expenses") twice, which is tautological rather than explanatory. It does imply a list-style read of recurring expenses, but gives no scope, filters, or differentiation from the sibling get_recurring_expenses_by_id.

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 indication of when to use this list endpoint versus get_recurring_expenses_by_id or execute_read. The only actionable pointer is "describe_operation provides native request schemas," which is a discovery hint, not when-to-use guidance.

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