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

Beyond the annotations, it discloses the real side effects: the action enables the link and registers the provider webhook after authorization, calls out that it is state-changing and external-provider facing, and lists prerequisites (Enterprise access, manageable Space permission, provider access). This is exactly the extra context annotations cannot carry.

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 dense sentences, front-loaded with the usage trigger followed by the behavioral and prerequisite details. No filler or repetition of the title.

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?

With no output schema, the description carries the return-side burden, and it adequately conveys the observable effect (link enabled, webhook registered) plus all access preconditions. Nothing an agent needs to invoke this correctly is missing.

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 100%, so both parameters (space_id, link_id) are already fully documented in the schema. The description only restates that these are required without adding format, range, or lookup guidance, so baseline 3 applies.

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?

States a specific verb and resource ('turn on or resume an existing Autopilot repository sync link for a Space') and is clearly distinguishable from its sibling disable-space-repository-link. An agent can identify the operation without opening any schema.

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?

'Use this when the user wants to turn on or resume an existing ... link' gives a clear trigger condition. It does not, however, name the disable counterpart as an exclusion or point at list-space-repository-links (that routing hint sits in the schema, not the description).

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