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

Annotations already declare destructiveHint=true, readOnlyHint=false and closed-world scope, so the description correctly does not duplicate the safety profile. It does add genuinely new information beyond the annotations: that the deletion is reversible by the person inside the app. However, it says nothing about whether an undo API exists, whether the call is idempotent, or what happens to a stale version.

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 action and resource, with no filler. The undo sentence is arguably tangential to selection but is short enough to earn its place as behavioral context.

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 destructive three-parameter mutation with no annotation-free schema documentation and no output schema, the description is too thin. It omits the meaning and failure behavior of the required version token and leaves the optional summary parameter completely undocumented, so an agent cannot reliably construct a correct call.

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 0%, so the description carries the full burden, and it only names id and version without explaining either. It never mentions the optional "summary" parameter at all, and it does not explain that "version" is a concurrency token that must match the current record state.

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 gives a specific verb and resource ("Removes one workout") and scopes it to a single record, which distinguishes it from list/save/plan workout siblings and from the delete_food/delete_reminder family by resource type. It stops short of naming any sibling explicitly, so it does not meet the highest bar.

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?

There is no explicit when-to-use or when-not-to-use guidance. The agent must infer that this is the correct call whenever a workout must be removed, and nothing points to alternatives such as trainrec_undo_change for reversal, even though the description mentions undoability.

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