Time Lock Timesheet

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

Annotations already declare the mutation profile (readOnlyHint=false, idempotentHint=true, destructiveHint=false), so the description is not carrying the safety burden alone. It adds genuinely non-structural context: the underlying route is undocumented and may be changed or removed without notice. It stops short of saying what locking actually blocks (edits, submissions, approvals) or what the response contains.

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 tight sentences: the operational sentence is front-loaded and the caveat follows. The undocumented-route warning earns its place because it materially affects trust in the call; nothing is redundant.

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?

With an output schema present, return values need not be described, and the key risk factors (undocumented route, date format, unlock toggle) are covered. The remaining gap is the effect of the operation itself — whether locking prevents edits or approvals and whether it is reversible via the unlock flag — which an agent would want before mutating timesheet data.

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 compensate for all three parameters. It does explain lock_date's format (YYYY-MM-DD) and the inclusive 'up to' semantics, and the 'or unlock' phrasing gives meaning to the boolean flag, but user_id is left implicit and nothing is said about what happens to entries after the lock date or timezone handling.

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 opens with a specific verb pair and resource: 'Lock or unlock timesheet records for a user up to a specified lock date'. No sibling tool performs locking, so the operation is unmistakable against time_create_time_entry, time_update_time_approval_status, and the rest of the time_* family.

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?

The usage is implied by the semantics ('lock up to a date' means you need a user and a cutoff), but there is no explicit when-to-use guidance, no stated prerequisite or permission requirement, and no mention of how this relates to sibling tools like time_update_time_approval_status or time_reconcile_and_submit_week.

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