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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered elsewhere. The description contributes only the shape of returned records (category and vertical); it says nothing about result volume, pagination, or whether the two filters combine as AND or OR. With annotations carrying the behavioral load, a 3 fits.

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 short sentences, front-loaded with the identity of the resource and followed by the filter behavior; nothing is padded. The phrasing "with, with" is slightly awkward, which keeps it off a 5, but no sentence is wasted.

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 two-optional-parameter read tool with full schema coverage and no output schema, this is close to sufficient, but the description never states that the result is a list of systems and gives no hint about the return shape beyond two fields. A single clause on what a call returns would make it complete.

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%: the schema already explains that query matches name, alias or category, and that vertical accepts a slug, name or alias case-insensitively, including examples. The description only echoes that filtering is possible and gives no syntax or combination semantics 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 description names the resource (systems Callvu integrates with) and adds that each record carries a category and vertical, so an agent knows this is a listing of integration records rather than a lookup of one. It lacks an explicit verb and largely restates the title, but the resource is unambiguous enough to route correctly against siblings like list_verticals.

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?

"Filter by vertical or a text query" implies usage context for the two optional filters, but does not state when to prefer this tool over related lookups such as list_verticals or get_vertical, nor when to combine filters versus use them separately. Guidance is implied rather than explicit.

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