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

No annotations are provided, so the description carries the behavioral disclosure burden. It handles this well by disclosing the 50-post limit, non-blocking per-post failures, failure categories, and the ISO 8601 format for scheduledAt. It does not mention whether the operation is reversible or what authorization is required, but core behavior is clearly disclosed.

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 sentences carry the essential information with no filler. The action, scope, usage trigger, failure behavior, and date format are all front-loaded and each sentence earns its place.

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?

Given no output schema and no annotations, the description does a solid job by mentioning the results array for per-post failures and the 50-post cap. It omits how timezone interacts with scheduledAt and does not describe the overall response shape in detail, but an agent has enough to invoke the tool 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 description coverage is 0%, so the description must compensate. It adds useful meaning by specifying that scheduledAt must be ISO 8601, but it says nothing about the optional timezone parameter or how postIds are interpreted beyond their schema type. Partial compensation only.

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 names a specific operation—moving scheduled posts to a new publish time—and sets a concrete scope: up to 50 in one call. The example 'push all Friday's posts to Monday' clearly distinguishes this from single-post scheduling or deletion tools in the sibling list. This is unambiguous and actionable.

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 description explicitly says 'Use when the user says...' and gives a realistic bulk-rescheduling request, which gives clear context for when this tool is appropriate. It does not name alternatives or state when not to use it versus individual update tools, so it falls short of full guidance.

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