text

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

The description discloses that add_tx/add_tx_bytes only stage text and do not transmit, which is a non-obvious behavior. However, with no annotations, the description carries the full burden and it does not mention side effects of clear operations, return values, or permissions, so it's only partially transparent.

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 paragraph with a list of operations. It's concise but not well-structured; it dumps a list without grouping or front-loading the most critical information. It's adequate but could be more readable.

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?

The tool has 4 parameters, no annotations, and no output schema. The description lists operations but lacks details on return values, error conditions, and the context (e.g., which modem it applies to). It also doesn't explain the difference between get_rxtx_data, get_rx_data, get_tx_data. This is incomplete for an agent to use it correctly.

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?

The schema has no descriptions, so the description must explain parameters. It does explain start, length, and value in the context of operations (e.g., read uses start/length, get_rx uses value as [start, length]). However, not all parameters are fully described (e.g., operation has no enum, but the list of operations gives meaning). Some operations like add_tx_queue are not explained in terms of parameters.

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 it handles RX/TX text and data and lists specific operations (read, rx_length, get_rx, etc.), making the resource and actions clear. However, it does not explicitly distinguish itself from sibling tools like transmit or modem, so it doesn't earn a 5.

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 on when to use this tool versus alternatives. It doesn't mention any exclusions or comparisons to other tools. The only usage note is that add_tx stages text without transmitting, which is a behavioral detail but not a usage guideline for tool selection.

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