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

Adds genuinely useful behavior beyond annotations: staff see it immediately and can be forced to confirm read. However, destructiveHint=true is set while this is an additive create operation, and the description neither explains nor reconciles that; it also omits auth/permission requirements and what happens on a failed post.

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?

A single densely packed sentence plus the endpoint reference; nothing is repeated and the core action leads. The trailing "Deputy: PUT /api/v1/..." is marginal but cheap and useful for API-aware agents.

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 5-parameter create tool with no output schema, the description covers purpose, side effects (immediate visibility), and the confirm flow, with the schema handling parameter detail. Only the destructiveHint mismatch and absence of failure/permission behavior keep it from being fully complete.

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%, so the schema already documents all five parameters, including the user-ids-not-employee-ids distinction. The description only restates the targeting and confirm options at a high level, adding no syntax or format detail beyond the schema. 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?

Specific verb + resource ("Post a memo to a location's news feed") with scope and optional behaviors (read confirmation, multi-location/user targeting) stated up front. It also names the underlying Deputy endpoint, making it unmistakably distinct from the shift/timesheet/leave siblings.

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?

Implies usage context (news feed post, visible to staff immediately) but never states when to choose this over an alternative or any prerequisites such as permissions. No sibling tool covers memos, so the gap is narrow, but the description gives no explicit when-to-use guidance.

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