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

Annotations already declare idempotentHint=true, destructiveHint=true and openWorldHint=false, and the description adds a genuinely useful storage detail (noon UTC anchoring so the day is timezone-stable). However, it does not disclose the destructive side the annotation implies — what happens to a previously scheduled date, i.e. whether this overwrites it — and leaves 'does not publish' as the only behavioral boundary.

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 tight sentences, front-loaded with the action, then the input format, then the scope boundary. No filler and every clause conveys either format or scope.

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?

No output schema exists, and nothing in the description promises a return shape, which is acceptable. For a destructive-flagged mutation the main remaining gaps are overwrite semantics for an already-scheduled card and the role of brandId; otherwise an agent has enough to call it correctly.

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 0%, so the description must carry all parameter meaning. It does a good job on 'date' (YYYY-MM-DD vs full ISO timestamp, with the reason for the noon-UTC normalization), but says nothing about contentId (beyond being the target card) or brandId, leaving one of three parameters entirely unexplained.

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+resource ('Set the planned calendar date for a content card') and clarifies the scope of the write ('This only plans the date; it does not publish'), which separates it from publish-side and update_content-style siblings. An agent knows exactly what state changes without opening the schema.

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?

Gives clear when-to-use context (planning the posting day) and an explicit when-not ('it does not publish'). It does not name the counterpart tool (unschedule_content) or state what to do to clear a date, so one routing question is left to inference.

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