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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered. The description adds genuinely new behavioral context: this is a partial destruction that preserves 'the remaining event copies,' which is exactly what an agent would worry about with a destructive tool. It stops short of explaining what 'held' means or what permissions are needed.

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?

One compact sentence, front-loaded with the action and scoped by a subordinate clause. No filler. It is slightly ambiguous enough to require a re-read, keeping it out of the top score.

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 destructive mutation with no output schema and only annotation-level safety hints, the description omits key context: what a 'held' deletion is, which tool created that state, and how it relates to delete_sync. Adequate to call the tool, but incomplete for confident selection among many sync-related siblings.

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 schema contributes nothing about syncId. The description gives no explicit semantics for the parameter either, relying entirely on the self-evident name 'syncId'. For a single obvious identifier, 3 is a fair minimum-viable score rather than a larger penalty.

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 and resource: 'Finish a held sync deletion.' It implies a two-phase deletion workflow, which is more informative than the name alone. However, it never names or differentiates itself from the sibling delete_sync, so an agent cannot tell which entrypoint to pick without opening schemas.

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 word 'held' implies this is a follow-up step to an already-initiated deletion, and 'keeping the remaining event copies' hints at the outcome. But there is no explicit when-to-use, no mention of the prerequisite tool that held the deletion, and no comparison to delete_sync. Usage is only inferred.

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