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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is fully covered by structured data. The description adds the useful reminder that muscle/equipment are optional filters, but says nothing about result counts, ordering, or how results are capped beyond the limit parameter.

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?

Purpose is front-loaded in the first clause, followed by a compact set of disambiguating example queries. The examples earn their place by illustrating parameter combinations, though the four examples are slightly redundant with one another.

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 read-only filtered-list tool with full annotation coverage and a fully described input schema, the description supplies what remains: the request patterns that select it and the fact that filters are optional. Without an output schema it would be marginally better to note the shape of the returned exercise list, but nothing essential to a correct call is missing.

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 100% for all four parameters, so the cheatsheets for muscle and equipment values, the level enum, and the limit range are all already documented. The example queries reinforce that muscle and equipment can be combined, but add no syntax or format detail beyond the schema.

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 resource (exercises) and the two filters that define scope (muscle, available equipment), so an agent can identify it as a filtered list tool. It does not explicitly contrast itself with the singular get_exercise or with get_workout_plan, so differentiation is only implied by the plural name and title.

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?

Concrete example phrasings ('what can I do for chest with no equipment?', 'glute exercises with bands') make it clear which user requests route here, and 'Give a muscle, equipment or both' states the valid invocation shapes. It never states when NOT to use it or points to the sibling tools as alternatives.

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