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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the safety profile is covered. The description only adds the scope qualifier 'inteiro ... de uma vez' and says nothing about irreversibility, re-authentication, or what 'history' actually contains, which would be the value-add beyond the annotations.

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 short sentence with the destructive scope front-loaded and no filler. Nothing in it is redundant or padded.

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, irreversible, destructive tool the description leaves real ambiguity: which history (watch history, chat history, browsing?) given that multiple siblings reference history, and no warning that the wipe cannot be undone. The annotations cover the destructive flag but not the domain ambiguity.

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 per the rubric the baseline is 4. There is nothing for the description to disambiguate or clarify beyond confirming the operation is unfiltered and total.

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?

States a specific verb ('Limpa') and resource ('histórico inteiro do dono'), and the phrase 'de uma vez' signals a wholesale wipe rather than a partial edit. It does not explicitly contrast itself with the read-oriented siblings (get_history, chat_history), so differentiation is only implicit.

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 says what happens but never when to use it, when not to, or which alternative applies. With siblings like get_history and forget_watch in the same family, an agent gets no routing guidance at all.

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