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

Annotations already declare readOnlyHint=true, so safety is covered by structured data. The description contributes the useful detail that values include int/bool/string configuration constants governing protocol behavior, but says nothing about caching, refresh cadence, or whether constants can change mid-epoch across an upgrade cycle.

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 or repetition of the tool name. It is efficient, though the trailing clause about value types could be tightened if brevity were the only goal.

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 no-parameter, no-output-schema read endpoint, the description carries the essential shape of the response (integer/boolean/string configuration values). Nothing critical is missing, though noting the absence of filtering or pagination would close the loop.

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; baseline 4 applies. The description correctly implies a single unfiltered snapshot of all constants rather than a targeted lookup.

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 ('Returns') and resource ('protocol constants') and enumerates the value types (integer, boolean, string), so the agent knows exactly what it gets back. It doesn't differentiate from nearby config-ish siblings like get_mimir or get_version, but the resource is concrete enough to be selectable.

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 guidance, no statement of what this replaces, and no mention of the alternative config endpoints (get_mimir, get_network_info) in a very large sibling set. The agent must infer usage purely from the resource name.

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