get_interfaces_counters

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

readOnlyHint=true already declares the safe-read profile, and the '[READ]' prefix merely restates it without adding anything. No mention of whether counters are cumulative or interval-based, what happens on an unknown target, rate limits, or failure modes—so the description contributes almost nothing beyond the annotation.

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 front-loaded sentence plus a one-line arg gloss; every fragment carries information and nothing is padded. Ideal signal-to-noise for a simple getter.

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 no output schema, the description partially compensates by listing the counter families returned, which is the right instinct. However it leaves the optional-but-defaulted target behavior unexplained and says nothing about result scoping (per-interface records, ordering, or whether all interfaces are returned), leaving real gaps for a tool whose output shape is undocumented.

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 coverage is 0% and the single 'target' parameter is only typed as a nullable string with a null default, so the description's 'Device name from config' is genuinely additive—it tells the agent where the identifier comes from. It still omits whether target is optional, what happens if omitted (all devices? local device?), and any naming format.

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 names a specific resource (per-interface counters) and enumerates what is counted (octets, packets, errors, discards), which clearly separates it from the config-oriented sibling get_interfaces and from get_interfaces_ip. It never names an alternative tool explicitly, so it stops short of full sibling differentiation.

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?

Usage is only implied by the '[READ]' tag and the counter-focused scope; there is no explicit statement of when to reach for this versus get_interfaces, interface_health_rca, or get_interfaces_ip. A capable agent can infer intent, but the definition offers no routing guidance.

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