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

The annotations already establish the operation is not read-only, not destructive, and idempotent. The description adds useful behavioral context: it transitions the post out of pending_approval, auto-schedules when no exact time is given, and reports the resolved scheduledAt in the response. It does not discuss failure modes or edge cases, but the safety profile is already covered by annotations.

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 focused sentences: the main behavior, the scheduling options, and the sibling alternative. No filler, no repetition of schema details, and the most important information is front-loaded.

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 tool with one required parameter and no nested objects, the description is complete enough for an agent to call it correctly. It explains both scheduling modes and mentions the key response field. The absence of an output schema means more detail about the full response would be helpful, but the essential behavior is well covered.

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 67%, and the description compensates well for the scheduledAt and autoSchedule parameters by explaining the exact-time path, the auto-scheduling path, and the 'omit scheduledAt' default. contentPostId gets no detailed semantics, but its role as the target post is clear from the surrounding text and 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?

The description states a specific action ('approves'), a specific resource ('content post'), and a clear precondition ('pending_approval'), plus its scheduling effect. It also names the directly related sibling campaignstack_reject_content_post, distinguishing approval from rejection unambiguously.

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?

It clearly defines when to use the tool: when a content post is pending approval and the user wants to approve and schedule it. It also explicitly points to campaignstack_reject_content_post as the alternative for sending it back to draft. It does not mention exclusions like already-approved posts, so it falls just short of a 5.

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