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

Annotations already declare readOnlyHint=false, destructiveHint=false and openWorldHint=false, covering the safety profile. The description adds nothing beyond that: it doesn't say whether the previous scheduled date is overwritten, whether the brief must be in a particular state (e.g., draft vs. approved) to be rescheduled, or what permissions are required. The '(YYYY-MM-DD)' hint merely restates the schema's date format.

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 front-loaded sentence with no filler; the verb and target land first. It is efficiently written, though for a 5-parameter mutation the brevity borders on under-specification rather than pure conciseness.

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?

A non-read-only mutation with 5 required IDs, zero schema descriptions, no output schema, and no guidance leaves significant gaps. The description should at minimum identify the four required IDs and state what happens to the prior schedule; as written it is not complete enough to invoke confidently.

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% across 5 required parameters, so the description must carry the burden and does not. It only touches scheduledDate (and only its format, already encoded in the schema pattern), leaving projectId, siteId, planId and briefId entirely unexplained — an agent cannot tell where these IDs come from or what they scope.

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 verb (move/reschedule), the affected resource (article brief), and the target attribute (scheduled date on the content calendar), so an agent understands the operation immediately. It never distinguishes itself from near-neighbors like update_content_brief_instructions or decide_content_brief, but no sibling performs the same rescheduling action, so confusion risk is low.

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?

There is no when-to-use guidance, no statement of prerequisites, and no mention of alternatives such as update_content_brief_instructions for changing brief content. Usage is only inferable from the name and one-line description.

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