configure_bus

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

With no annotations, the description carries the full burden and does well: it states that every None argument is left unchanged, that typing is routed to the active protocol, that omission of protocol triggers a query of the current mode, and that unknown keywords are validated against a manual-derived whitelist. It omits permission/auth requirements and the write's reversibility, but the mutation and defaulting semantics are unusually well disclosed.

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 text is long, but for a 16-parameter tool spanning ten protocols the density is justified, and the top line is front-loaded with the core purpose followed by structured bullet groups. Minor redundancy (repeated protocol lists) keeps it from a 5, but almost every line 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?

Given high complexity, no annotations, a zero-documentation schema, and an output schema that handles return values, the description supplies everything needed to call the tool correctly: parameter semantics, routing, defaults, legal values, and the escape hatch. Nothing an agent needs 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 0% and all 16 parameters have bare titles, yet the description compensates fully: it documents display, format, event, label, position, threshold/threshold_type (with legal types and voltage range), source, baud (with per-protocol ranges), dbits, parity, polarity (incl. cross-spelling mapping), endian, and the 'extra' sub-path mechanism with per-protocol legal keywords. This is exemplary compensation for a zero-coverage 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 gives a specific verb and resource ('Configure decoding bus BUS1..BUS4') and enumerates the covered settings, so the agent knows exactly what the tool does. However, it never distinguishes itself from the many protocol-specific siblings (configure_bus_parallel, configure_bus_rs232, configure_bus_iic, etc.), so the agent must infer whether this generic entry point is preferred over them.

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?

Usage is implied through the routing rules (protocol= selects and routes typed params; if omitted the current mode is queried first) and the 'extra' escape hatch, which conveys how to call it. But there is no explicit when-to-use/when-not guidance and no mention of the dedicated configure_bus_<protocol> alternatives, leaving the agent to guess which tool to pick.

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