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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does reveal a key limitation (deliver unavailable due to MCP authentication constraints), but it does not disclose other important behaviors such as whether actions are reversible, required permissions, side effects, or response format. For a state-changing tool, this is a significant gap.

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?

The description is somewhat long but every sentence carries weight: it defines the tool's purpose, lists actions, and provides a critical security constraint with a concrete alternative. The structure is logical, though the REST endpoint detail could be trimmed without losing the core warning.

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?

Given the tool's complexity (7 params, 3 enums, no output schema) and lack of annotations, the description is incomplete. It covers only the action list and the 'deliver' exclusion, but omits parameter details (e.g., noShowType, deliveryType, notes), error conditions, permission requirements, and return values. A more thorough description is needed for reliable invocation.

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 0%, so the description must compensate by explaining parameters. It only lists the action values (confirm, start, complete, no-show), which is already present in the enum, and provides no explanation for notes, noShowType, deliveryType, apiKey, or how they relate to each action. This adds no semantic value beyond the schema.

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 clearly states a specific verb ('Advance') and resource ('session through the Servicialo lifecycle'), enumerates the exact actions available (confirm, start, complete, no-show), and explicitly distinguishes itself by noting the 'deliver' action is not available via MCP. This effectively differentiates from sibling tools like booking_cancel or booking_reschedule.

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 description provides clear context for when to use the tool (to advance a session lifecycle) and explicitly states an exclusion: the 'deliver' action is not available and must be done via a REST endpoint, naming that endpoint. However, it does not compare against other lifecycle-related siblings like lifecycle_transition, so guidance is strong but not fully exhaustive.

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