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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds value beyond that: an explicit authorization requirement (Reviewer role) and a paginated/cursor-based access pattern, plus the underlying endpoint. It does not state rate limits or pagination termination beyond what the schema says.

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 compact sentences, front-loaded with the resource and its returned fields, followed by the prerequisite and endpoint. Every clause carries information the agent needs to decide and call correctly; nothing is padded.

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?

Although there is no output schema, the description compensates by naming the returned fields (key id, linked project id, linked key id) and that results are paged. Combined with the Reviewer-role prerequisite and the read-only annotations, an agent has everything needed to invoke this correctly.

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 all three parameters (project, limit, next) are fully documented in the schema itself, including the paging chain semantics. The description only says 'paged' and does not add format or constraint detail beyond the schema; baseline 3 is appropriate.

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 — list links between duplicate source keys — and goes further by enumerating the fields each link carries (key id, linked project id, linked key id), so the agent knows exactly what a 'link' is. No sibling tool in the list touches key links, so it is unambiguously differentiated.

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?

Provides one real prerequisite — 'Needs the Reviewer role' — and flags paging, which is useful selection context. However it names no alternative tool and gives no when-to-use/when-not guidance, so the agent must infer that this is the way to audit duplicate-key links.

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