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

Annotations already declare readOnlyHint and idempotentHint, so the agent knows it is safe and idempotent. The description adds that the result is a list of services with pitches, which implies a read operation returning content, but it does not disclose details like response format, ordering, or pagination. Given the annotation coverage, this is adequate but not rich.

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 description is a single, tightly worded sentence that immediately conveys the essence of the tool. It is front-loaded with the main point and contains no filler. Perfectly concise.

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 must convey what the tool returns. It indicates a list of services with pitches, but does not specify the structure or fields of each service. Given the tool's simplicity, this might be enough for an agent to anticipate a list, but it leaves out potential details like service IDs, prices, or categories. It is minimally complete but not exhaustive.

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?

There are zero parameters and the schema is empty with 100% coverage. The baseline for 0 params is 4, and the description does not need to add parameter-specific meaning. The description's reference to 'services' and 'pitches' gives a hint of what the output contains, which is sufficient.

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 clearly states the resource ('services Ruben sells') and the nature of the content ('one-line pitches'). It distinguishes itself from siblings like get_resume (resume data), book_intro (booking), and check_availability (availability checks) by being specifically about services.

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 gives no indication of when to use this tool versus alternatives. There are no exclusions, conditions, or references to sibling tools. An agent gets no guidance on when a call to get_services is appropriate.

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