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

Goes well beyond the annotations (readOnly=false, openWorld=true, destructive=false) by disclosing quota impact (counts toward monthly text allotment), a prerequisite (texting enabled with client opt-in), the one-way no-default-message behavior, a confirmation-by-default policy that can be disabled per-tool, and the credential requirement. This is exactly the behavioral context an agent needs.

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?

Front-loads what the tool does before the caveats, and the warning about reaching other people is prominent. Slightly redundant, since the first two sentences restate the same ready-for-pickup action from a ticket.

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 outbound-message tool with no output schema, everything an agent needs is present: side effects, quota consumption, opt-in prerequisite, confirmation policy, and auth. Nothing essential is missing.

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%, so both parameters are already documented. The description reinforces that the message must be supplied each time (no saved default) but adds no syntax or format detail beyond the schema, so baseline 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 (text the client that their pet is ready) and pins the context (from the appointment ticket, the one-way Ready For Pickup text). Within the DaySmart sibling set this is the only client-texting tool, so 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?

Gives clear context for use (ready-for-pickup from a ticket) plus an explicit operational rule: confirm with the user before each call because it reaches other people. It does not name an alternative send tool, but none exists in the DaySmart family, so the guidance is effectively complete.

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