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

Annotations already declare readOnlyHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds real value by disclosing that the call may return reauthorization/browser guidance rather than data — an out-of-band outcome an agent otherwise would not expect. It stops short of describing pagination or failure modes.

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 short sentences, front-loaded with the trigger condition, then the read-only framing, then prerequisites. Dense but every clause carries information; nothing is padding.

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 compensates by telling the agent what comes back (repository choices or reauthorization/browser guidance). Combined with full parameter coverage and read-only annotations, an agent has enough to call this correctly; only pagination/emptiness behavior is unaddressed.

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 coverage is 100% and both parameters are fully documented in the schema, so the baseline of 3 applies. The description only restates that provider and space_id are required, adding no format or constraint detail beyond the schema's own enum listing.

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 ('fetches repository choices') scoped to connected external providers, and situates it in the Autopilot setup flow. It implicitly distinguishes itself from list-provider-connections and list-space-repository-links, though it never names those siblings to sharpen the contrast.

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 choose a repository from a connected provider before creating an Autopilot link' gives a concrete triggering condition. There is no explicit when-not or named alternative, so the agent must infer that existing links are handled elsewhere.

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