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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, so the safety profile is covered. The description adds genuine value beyond that by revealing the returned sections and the required logs:read scope, which is exactly the kind of auth context annotations cannot express. It stops short of describing any time window, pagination, or limit behavior despite mentioning 'last week's clicks'.

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 clauses with no filler; the payload is front-loaded and the scope constraint is placed at the end where it reads as a constraint rather than content. Nothing could be trimmed without losing the field inventory, which is the description's core contribution.

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 is the only place return values are disclosed, and it does enumerate the four result sections, plus the required scope. For a zero-required-parameter read tool with fully documented params and rich annotations, that is nearly sufficient; the missing piece is whether 'last week' is fixed or configurable and how much data is returned.

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% and each optional parameter documents its default (production branch, last-used/only project, token organization), so the schema carries the semantics. The description's mention of 'the branch's link host' loosely ties the output to the branch parameter, adding a small amount of framing but no new defaulting or format detail beyond the schema.

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 is a noun phrase enumerating the payload (link host, blockers, short links with paths and clicks, weekly clicks by platform) rather than stating a verb+resource. Combined with the title 'List app links' an agent can infer a read of link configuration/diagnostics, but the text itself never says it lists or retrieves anything, and it does not name the sibling links.create to contrast the read path.

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?

There is no when-to-use guidance: nothing says whether this is for diagnosing link open failures, auditing click counts, or inspecting host configuration, and no alternatives (links.create, logs.get, analytics.summary) are referenced. The only scoping cue is the permission string, which tells the agent nothing about task selection.

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