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

Annotations already declare readOnly, idempotent, non-destructive, closed-world, so the safety profile is covered. The description adds genuinely new behavioral context: the history is 'bounded' (limited window), and results carry a 'truncation state' flag plus 'settled credits', telling the agent that output may be incomplete and includes billing state. Missing only ordering or result-count details.

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?

A single dense sentence with the resource front-loaded and the distinguishing qualifiers ('bounded recent', 'truncation state') immediately after. No filler or redundancy.

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?

With zero params, no output schema, and annotations covering the safety profile, the description carries the return-value burden and does so partially by naming three fields. Ordering of threads and the meaning of the bound/limit are left implicit, which is the only real gap.

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 tool takes zero parameters, so the baseline is 4. The description correctly describes no inputs and instead spends its words on what the call returns, which is the right use of space here.

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?

Specific verb plus resource: 'List the bounded recent Dex conversation history for the project', with named return fields (current task, settled credits, truncation state). An agent can distinguish this from devtune_get_dex_events or devtune_list_dex_handoffs by the 'bounded recent history' framing, though no sibling is named explicitly.

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 never states when to use this instead of devtune_get_dex_events, devtune_list_dex_handoffs, or devtune_start_dex_conversation. 'Bounded recent' hints at a scoped overview, but that is a property of the result set, not guidance on tool selection. No prerequisites or exclusions are given.

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