tailscale_device_summary

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the tool retrieves a summary, implying a read-only operation, but doesn't address potential behavioral aspects such as permissions needed, rate limits, data freshness, or what format the summary is returned in (e.g., aggregated counts vs. detailed list). This leaves significant gaps for an agent to understand how to use it effectively.

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, efficient sentence that front-loads the core action ('Get a summary') and specifies the key dimensions without any wasted words. It's appropriately sized for a tool with no parameters and a straightforward purpose.

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 the tool's complexity is low (0 parameters, no output schema, no annotations), the description is minimally complete—it states what the tool does. However, it lacks context on usage versus siblings and behavioral details, which are important for an agent to operate correctly in this sibling-rich environment. Without an output schema, it also doesn't explain what the summary looks like, leaving a gap in understanding the return value.

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 input schema has 0 parameters with 100% coverage, meaning no parameters are documented in the schema. The description doesn't mention any parameters, which is appropriate since none exist. It adds value by explaining what the summary includes (OS type, status, update availability), but since there are no parameters to describe, the baseline is high.

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 clearly states the tool's purpose with specific verbs ('Get a summary') and resources ('devices'), and specifies the summary dimensions (OS type, online/offline status, update availability). However, it doesn't explicitly differentiate from sibling tools like 'tailscale_list_devices' or 'tailscale_get_device', which likely provide different levels of detail or formats.

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?

The description provides no guidance on when to use this tool versus alternatives. With siblings like 'tailscale_list_devices', 'tailscale_list_online_devices', and 'tailscale_list_offline_devices', there's no indication of when this summary tool is preferred over those more specific listing tools, leaving usage context unclear.

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