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

With no annotations, the description carries the burden and does disclose key behavior: this REPLACES (destructive full overwrite) and is confirm-gated, with the confirm param's schema noting preview-only when false. It omits auth/permission requirements and return behavior, so it is strong but not exhaustive.

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 sentences, front-loaded with the destructive action and scope, then the follow-up guidance. No filler; every clause earns its place.

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 mutation tool with no annotations and no output schema, the description covers destructive semantics, the confirmation gate, and routing guidance. It leaves out permission requirements and the shape of the preview response, but is otherwise complete enough to invoke correctly.

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 50% (confirm documented, testimonials not). The description compensates by clarifying that the testimonials array is a full replacement list ('Sends the full list'), which is critical semantics absent from the schema, though the nested item fields (clientName, profileImage, note) remain undocumented in both.

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 (Replace) and resource (the coach's own public client testimonials), scoping it to the coach's own record and distinguishing it from sibling update_my_* tools like update_my_transformations or update_my_professional.

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?

Gives real routing guidance: read get_my_profile first if only adding one, which names an alternative tool and the condition that selects it. It stops short of an explicit when-not statement, so it is clear context rather than full usage rules.

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