update_fail2ban_conf

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, and it discloses nothing: whether the change applies immediately or requires a Fail2ban reload, whether existing settings are overwritten, whether invalid keys are rejected, or what happens to concurrent edits. For a mutation tool this is a complete gap.

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?

It is a single short sentence, but its brevity comes from omission rather than efficiency; there is no front-loaded scope, no object of the update, and no actionable detail. Brevity here is under-specification, not conciseness.

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 two-parameter mutation tool with no annotations, no output schema, and zero schema description coverage, the description should at minimum identify the affected configuration section and the effect of the write. None of that is present.

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?

Schema description coverage is 0% for two required parameters, and the description offers no help: it never explains what 'key' refers to (an ini key? a jail? a dotted path?) or what value formats are accepted. The agent is left to guess the entire input contract.

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 phrase 'Update Fail2ban configuration' gives a clear verb and resource, so the agent knows it mutates Fail2ban config. However, it is essentially a restatement of the tool name and gives no basis to distinguish it from siblings like update_fail2ban_conf_by_file, update_fail2ban_conf_by_file, or operate_fail2ban, nor does it hint at what part of the configuration it targets.

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 guidance on when to use this tool versus update_fail2ban_conf_by_file (whole-file editing) or operate_fail2ban (service control), nor any prerequisites such as required privileges or whether a restart is needed. Usage must be inferred entirely from the name.

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