list_chat_sessions

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

No annotations are supplied, so the description carries the full behavioral burden. "Lista" clearly implies a side-effect-free read and the description discloses what categories of state are returned (sessions, busy tabs, leases), which is useful context. However, it says nothing about result ordering, staleness/freshness, volume, or whether any auth/scope is required, which matters for a state-introspection 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?

A single front-loaded sentence with no filler, no restatement of the tool name, and nothing extraneous. The scoping qualifier ("ativas", "ocupadas", "em andamento") is presented immediately.

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 zero-parameter list tool with no output schema, the description does give an agent the broad shape of the response (active sessions, busy tabs, in-progress leases), which is the minimum needed to decide whether to call it. But without an output schema the description would need to say more about what a session record contains and how "lease" should be interpreted, and it does not.

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 there is nothing for the description to disambiguate beyond what the empty schema already conveys. Baseline 4 applies; no parameter meaning is added or needed.

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 a specific verb ("Lista") and resource ("sessoes ativas"), then extends scope to busy tabs and in-progress leases, which makes the tool's output domain clear. It does not name or contrast with the sibling chat_bridge_status, which plausibly overlaps with a session/bridge status read, so sibling differentiation is left to inference.

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?

There is no when-to-use or when-not-to-use guidance, and no named alternative. An agent reading this cannot tell whether to call it instead of chat_bridge_status for status information. The listing semantics imply a read use case, but the description states nothing explicit.

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