Who am I

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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description still adds real behavior: it is a live check (not cached), it reports how the workspace was chosen, its read-only status, and it surfaces warnings about shared credentials — none of which the annotations convey.

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 dense sentence with the resource front-loaded and the returned facets enumerated after it. Slightly list-like and could be split for readability, 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?

With no output schema, the description carries the burden of describing the return, and it does so by naming the fields reported (workspace/team/user, selection rationale, read-only flag, credential warnings). It stops short of the response shape or formatting, but is otherwise sufficient for a zero-arg introspection tool.

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?

Zero parameters, so the baseline is 4; there is nothing for the description to disambiguate. It correctly avoids inventing parameter-like detail.

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 ('Show') and a precise resource: which Slack workspace, team and user this server acts as. This is unmistakably distinct from every sibling tool (message, channel, user-lookup, status operations), so an agent can identify it without opening the schema.

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 rather than stated: the '(live check)' qualifier and the identity/credential framing suggest calling it to verify context before acting, but there is no explicit when-to-use, no when-not-to-use, and no named alternative. An agent can infer the situation but must do the work itself.

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