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

Annotations already declare readOnlyHint, idempotentHint, and non-destructive/closed-world, so safety is covered. The description adds value beyond that by disclosing the response container (data.items) and that an empty result is legal, which prevents an agent from treating 'no channels' as an error.

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 clauses with zero filler, front-loaded with the purpose and then the ID-field routing rules. Every sentence carries an actionable instruction an agent would otherwise get wrong.

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 does the necessary work of naming the return envelope and the two key fields (channelKey, id). It stops short of describing the other item fields or ordering, but an agent has enough to call and consume the result correctly.

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% and the single parameter already documents the 24-hex pattern and the 'never a personal platformId' constraint. The description only reinforces that it must be a Workspace ID; it adds no new syntax or validation detail beyond the schema, so the baseline of 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?

States a specific verb and resource ('List one Workspace's connected channels') with scope and even the return envelope (data.items, possibly empty). It distinguishes itself from the personal-list sibling by warning against list_connections IDs, though it does not mention the plausibly closer sibling company_get_platforms.

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?

Gives explicit downstream guidance: 'Copy channelKey verbatim into draft.platforms; use id for disconnect and creator-info,' plus a hard exclusion ('Never substitute personal list_connections IDs'). What's missing is the condition that would select this over company_get_platforms or company_get_platforms-like alternatives.

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