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

Annotations only cover the generic safety profile (readOnlyHint=false, openWorldHint=true, destructiveHint=false). The description adds genuinely new behavioral facts: the job is idempotent, it is created in a waiting_human state, and it deliberately does NOT trigger the third-party final submit — an important side-effect boundary. No auth or rate-limit detail, so not a 5.

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?

Two tight sentences: the precondition and action are front-loaded, and the second sentence exists only to draw the side-effect boundary. No filler or restated boilerplate.

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 mutation tool with no output schema and zero schema-description coverage, the description covers state and the critical "does not submit" caveat, but leaves the four required identifiers unexplained and does not say whether a preflight call is a prerequisite. Adequate, with real gaps an agent would hit.

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% and all four parameters (projectId, siteId, sourceId, idempotencyKey) are required and completely undocumented. The description's mention of an "idempotent" job hints at idempotencyKey's role, but it explains nothing about siteId, sourceId, projectId, or the 8-120 char key format, so it fails to compensate for the coverage gap.

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 gives a specific verb+resource (create a submission job) and pins the resulting state (waiting_human), which cleanly separates it from siblings like get_backlink_submission and record_backlink_submission_outcome. It stops short of naming an alternative sibling, so it lands at a clear-but-undifferentiated 4.

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?

"After user review and approval" establishes a real precondition for calling this tool, which is more than nothing. However, it never names preflight_backlink_submission or record_backlink_submission_outcome as the surrounding steps in the workflow, so the agent must infer where this sits in the sequence.

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