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

With no annotations, the description carries the full behavioral burden, yet it only notes "(confirm-gated)" — which the schema already documents in the confirm parameter's description. It says nothing about permissions, scoping, or what persistence actually occurs.

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 sentences, front-loaded with the core action and constraint; nothing is padded. The cross-reference sentence is terse to the point of being cryptic, but the structure is efficient.

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?

An 8-parameter creation tool with 13% schema coverage, no annotations, and no output schema gets almost no supporting detail here. The agent is left to guess parameter formats and lacks guidance on the template lifecycle, so the description is not complete enough for confident invocation.

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 only 13% across 8 parameters, so the description must compensate but does not. The note that "exercises follow the same shape as create_workout_plan's" is a cryptic cross-reference that the agent cannot resolve from the current schema, and fields like title, visibility, goal, tags, and difficulty are unexplained.

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 clear verb+resource ("Save a reusable workout plan template") and the word "reusable" implicitly distinguishes the artifact from a one-off plan. It does not directly name create_workout_plan as the non-template sibling it differs from, but the cross-reference to that tool partly signals the relationship.

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?

Usage is only implied: "reusable" hints at when a template is preferable to a plan, but there is no explicit when-to-use, when-not, or naming of alternatives like create_workout_plan or update_workout_plan_template. An agent must infer the workflow context.

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