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

Annotations only declare readOnlyHint=true; the description adds real information about what the call yields (a count of currently live links plus how often they were opened), which is valuable since there is no output schema. The word 'live' implicitly signals that expired or revoked links are excluded, though the description does not state the counting window or whether opens are all-time.

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?

One short sentence, front-loaded with the metric, with no filler or repetition. Nothing needs trimming and the key information appears first.

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?

For a one-parameter read-only aggregation with no output schema, telling the agent that the payload is a live-link count and open counts is largely sufficient. Missing only minor scoping details such as the time window for opens and whether revoked links are counted.

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 the single clientId parameter is fully documented in the schema (including the pointer to list_clients). The description only alludes to 'a client' and adds no syntax or sourcing detail beyond the schema, so the 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?

The sentence states a specific resource (client portal / private links) and specific metrics (live link count, open frequency), so an agent can tell it is an aggregate stats read rather than the link-creation tool. It does not name the closest siblings (create_client_portal_link, revoke_client_portal_links) or otherwise differentiate explicitly, and the phrasing as a question fragment is less crisp than a verb-first statement.

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 stated when-to-use or when-not-to-use guidance, no prerequisite, and no named alternative. An agent must infer from the metric list alone that this is the reporting companion to create/revoke portal link tools.

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