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 fully covered externally. The description adds only the workspace-scoping boundary; it says nothing about ordering, pagination, or how many campaigns are returned. With annotations doing the heavy lifting, a 3 is appropriate.

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 core purpose and no filler. The enumeration of status values is mildly redundant with the schema enum, which keeps it from being perfect, but nothing 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?

There is no output schema, so the description could reasonably say what a returned campaign looks like, whether results are paginated, or how they are ordered. For a simple zero-required-parameter list tool whose annotations cover safety, this is adequate but leaves notable gaps.

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 50%: 'search' is documented in the schema ('Match campaign name') while 'status' is not. The description compensates by enumerating the status values, but those values are already present in the schema enum, so it adds little real meaning and says nothing about how search matching works (prefix vs substring).

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 verb and resource ('List campaigns') and a scope ('in this workspace'), so an agent can distinguish it from get_campaign (single item) and from the other list_* siblings by resource noun. It reads clearly but does not explicitly contrast itself with the closest alternatives.

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 only implied: an agent can infer you call this to browse campaigns, and the status filter hints at narrowing a result set. There is no explicit when-to-use vs get_campaign, no statement of prerequisites, and no guidance on when this is preferable to other list tools.

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