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

Annotations already declare mutation, non-idempotency, and non-destructiveness. The description adds genuine value by disclosing that MCP approval requirements are org-configurable and that business workflow approvals always apply, but it never says what side effects occur in the target project (tasks created, duplicates on re-apply, partial failure handling).

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?

Three short sentences, front-loaded with the action and immediately followed by the key exclusion. The approval sentence is somewhat boilerplate but is operationally relevant for a mutation, so it 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?

An output schema exists, so return values need not be explained, but for a non-idempotent mutation with a nested, undocumented 2-parameter schema the description should say what actually gets created and what 'id' identifies. The 'does not create the destination' and approval notes cover part of the gap only.

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 must carry the burden. It clarifies that data.projectId must reference an existing project, but the top-level 'id' parameter is never mentioned — an agent cannot tell whether it is the template ID or something else, and the nested object shape is left entirely to 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 verb and resource: 'Apply a project_task template to an existing project.' However, siblings include apply_task_template and apply_project_budget_template, and the description gives no cue about how a project_task template differs from a task template, so an agent can't disambiguate from the name alone.

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?

'Does not create the destination' implies a precondition (project must already exist), which is a useful usage constraint. But there is no explicit guidance on when to use this versus apply_task_template, nor any statement of prerequisites such as template ownership or permissions.

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