esphome_call_service

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

With no annotations, the description carries full responsibility for disclosing side effects. It implies mutation (turning on device) but does not specify whether it can cause physical changes, require auth, fail silently, or return status/errors. This is a significant transparency gap for an action-oriented tool.

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 a single concise sentence with front-loaded action and examples. No filler or redundant information; every word earns its place.

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 tool with 4 parameters, a nested 'data' object, no output schema, and no annotations, the description is too sparse. It does not cover return values, error behavior, or how to discover valid service names, leaving an agent with insufficient context to invoke it correctly in varied scenarios.

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 all parameters have basic descriptions. The tool description adds only examples, not deeper semantics like the relationship between device_id and esphome_device, or how 'data' maps to service parameters. It meets the baseline but does not compensate 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 uses a specific verb ('call') and resource ('service on an ESPHome device') with concrete examples ('turn on light, switch relay'), making the core function clear. It is distinct from read-only siblings like esphome_get_states, though it doesn't explicitly differentiate itself from similar service-call tools.

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?

No guidance is provided about when to use this tool versus alternatives. It does not mention prerequisites, such as needing a device_id from esphome_list_devices, nor does it contrast with other ESPHome tools or generic command executors.

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