zabbix_comparar_periodos

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

No annotations are provided, so the description carries the full burden. It doesn't say this is a read-only operation, doesn't disclose required permissions, doesn't explain what 'equivalent' means operationally (same length? same time of day?), and doesn't mention limits on item types that have history data. Only the bare intent is conveyed.

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?

One sentence, no padding, so it is concise. But the '94.' numbering is meaningless artifact, and the brevity comes from under-specification rather than economy.

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?

An output schema exists, so return values need not be explained. Still, for a 5-parameter comparison tool with no annotations, the description leaves the time-unit ambiguity and the definition of equivalent periods unaddressed — the two things an agent most needs to call it correctly.

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% across 5 required parameters, so the description must compensate and does not. It never explains that itemid identifies the metric, nor — critically — whether periodo_1_inicio/fim and periodo_2_inicio/fim are epoch seconds, timestamps, or relative offsets. The phrase 'períodos equivalentes' hints at a constraint on the two ranges but leaves it undefined.

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 does state a specific verb and resource: comparing a metric's behavior across two equivalent periods. However, the leading '94.' is noise, and nothing distinguishes this from timeline-oriented siblings such as zabbix_consultar_historico, zabbix_consultar_tendencias, or zabbix_ultimos_valores, which an agent could plausibly pick instead.

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 choose this tool over the history or trend tools, nor any prerequisite such as needing an itemid that already supports collection. The only implied usage is 'two equivalent periods', which is a scenario, not a rule for selecting the tool.

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