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

With no annotations, the description carries the full behavioral burden. It implies a read-only discovery operation and adds a useful connection-scope caveat ('One connection covers...'), but it never explicitly states that no state changes occur or describes response/error behavior.

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 tightly written sentences front-load the core purpose and then add the key connection-scope detail. No filler or redundant restatement of the tool name.

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 an informational tool with one optional parameter and no output schema, the description covers what the tool returns and the connection caveat. It could be more explicit about response format or read-only guarantees, but the core context an agent needs to invoke it correctly is present.

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 the baseline is 3. The description adds value beyond the schema by clarifying what the connection grants access to: joined rooms and the private memory vault, which enriches the meaning of the optional connection parameter.

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 uses an active, specific verb ('Discover') and identifies a clear resource: Tincan's capabilities, operating guide, identity, workspace, plan, quota, and referral benefits. It conveys what the tool returns, though it does not explicitly contrast itself with siblings like context_get or workspace_claim.

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?

The phrase 'operating guide' implies this tool is the onboarding/reference entry point, but the description stops short of stating when to use it or when to prefer alternatives. No exclusions or alternative tool names are provided.

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