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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, lowering the bar. The description adds two useful pieces of context beyond that: only SUBMITTED entries are affected (so drafts aren't touched) and the feature requires timeTracking PRO+. It does not address reversibility, audit trail, or what happens to non-submitted entries.

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-load the core action and scope; the optional-reason and feature-gating notes follow compactly. No filler.

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 mutation tool with no output schema and a destructive annotation already set, the description covers scope, state precondition, and feature gating adequately. It lacks only permission/authorization and reversibility details an agent might want.

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 coverage is 67%: reason and weekStart are documented (weekStart as Monday YYYY-MM-DD), but userId carries no schema description. The description confirms reason is optional and scopes userId to 'a specific user,' adding only marginal meaning. Baseline 3 is appropriate.

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 (bulk-reject), resource (timesheet entries), and scope (all SUBMITTED entries for one user in one week). The word 'Bulk' plus the week-level scope clearly distinguishes it from the single-entry sibling reject_timesheet_entry.

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 SUBMITTED-only constraint implies when this applies (entries must be in a submitted state), but the description never explicitly says when to use this bulk version versus reject_timesheet_entry or the approval counterparts. Usage is inferable but not spelled out.

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