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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so credit goes to what the text adds: the visibility model (own + explicitly shared), sort order (most-recent first), pagination style, and the required recordings:read scope. That is real authorization and result-shape context beyond the annotations.

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, all front-loaded: scope first, return type second, pagination/sort/auth third. No filler and nothing structural is missing.

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 read/list tool with full annotation and schema coverage, this covers visibility scope, pagination, ordering and required scope. The only gap is that 'UserCallDTO' is referenced without saying what fields matter to a calling agent.

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%, so page, size, account and workspace are fully documented in the schema. The description only restates 'pagination is page+size' and adds nothing about the account/workspace selection parameters. 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?

Specific verb + resource + visibility scope: 'Page through all calls the actor user can see (their own + any explicitly shared)'. An agent can distinguish this list-all tool from hub_search_calls conceptually, though no sibling is named explicitly.

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?

Usage is implied by 'all calls ... can see' (unfiltered listing) versus the search siblings, but the description never states when to prefer hub_search_calls, hub_count_calls, or hub_get_call, nor any exclusions. Guidance must be inferred.

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