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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safe read-only nature is covered. The description adds the aggregation semantics (totals and top-N rather than raw events), which is useful, but discloses nothing about scope, time range, or rate limits.

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?

A single, front-loaded sentence that names the resource and enumerates the returned aggregates with zero padding. Efficient and easy to scan, though quite sparse.

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?

An output schema exists, so return-value detail is not required, and annotations cover the safety profile. What remains missing is any statement of scope/time range and any routing versus get_link_analytics, which is significant given the overlapping 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% and the single required link_id parameter is undocumented in both the schema and the description. 'For a link' only weakly implies what link_id is, so the description fails to compensate for the coverage gap.

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 resource and output shape ('Aggregate summary for a link: total queries, unique IPs, and top referrers'), which is clear and unambiguous. However, it does not distinguish itself from the sibling get_link_analytics, leaving the agent to guess how the two analytics tools differ.

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?

No when-to-use guidance, prerequisites, or routing to alternatives is provided. The presence of get_link_analytics (and get_link) among siblings makes the absence of any differentiation particularly costly, since an agent cannot tell which analytics tool to pick.

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