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

With no annotations, the description carries the full burden. It discloses the auth requirement (X-Context-Key) and the idempotency/versioning model (exact-request reuse, requestExpiresAt), which is real value. However, it does not state whether deletion is irreversible, what happens on version mismatch, or how conflicts are signalled.

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 dense, front-loaded sentences with no filler; the destructive action and its constraint lead. Minor ambiguity between the 'X-Context-Key' header and the 'key' parameter slightly muddies an otherwise tight statement.

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 versioned, idempotent mutation with 4 required params, no annotations and no output schema, the description should address failure modes and reversibility. It covers auth and retry semantics but leaves conflict handling and result behavior to inference.

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 0% across 4 required params. The description hints at expectedVersion ('with its current version'), requestExpiresAt, and idempotencyKey semantics, but the 'key' parameter is never explained and no formats or value expectations are given. Partial compensation, not full.

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+resource ('Delete guest text') and adds a concurrency qualifier ('with its current version'), which clearly distinguishes it from read_guest_context and save_guest_context. It does not explicitly name those siblings, but the action is unambiguous.

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?

Provides retry guidance ('reuse the exact request for retries within requestExpiresAt'), which tells the agent how to behave on repeated calls, but gives no guidance on when to choose deletion versus save/read on the guest context, nor any preconditions beyond the header requirement.

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