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

With no annotations, the description carries the full behavioral burden and does so richly: call answering script, AI/transcription disclosure, per-call SIP token, webhook secret behavior, booking-mode constraints, emergency handoff, and owner-only authorization. This is far beyond what the schema alone conveys.

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 front-loaded with purpose and required inputs, and most sentences add useful configuration detail. However, it is a dense single paragraph that would be easier to scan with structure, and it repeats references such as phone.saveVoiceJobType.

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 11-parameter, owner-only configuration tool with no annotations, the description supplies purpose, sequencing, side effects, defaults, constraints, and prerequisites. Because an output schema exists, it does not need to explain return values, and the remaining setup context is adequately covered.

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%, yet the description explains nearly every parameter: provider enum, SIP address, webhook secret, share_job_status, booking_mode defaults, lead_minutes, same_day_cutoff, service_zips, on_call_phone, and book_open_slots. The only oddity is that live_tools is referenced but absent from the schema, while all actual schema parameters are still covered.

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 states a specific verb and resource: setting up the shop's voice AI agent to answer calls, including provider and SIP address. It distinguishes the tool from phone.setRoute by explicitly saying the route is set separately, and from phone.saveVoiceJobType by naming it as a prerequisite for live booking.

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?

It gives clear context and alternatives: owner-only use, sequencing with phone.setRoute, and dependencies on schedule.addOpenSlots and phone.saveVoiceJobType. It stops short of explicitly excluding sibling tools such as phone_setOutboundAi or clarifying first-time setup versus reconfiguration, so it is not a full 5.

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