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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so safety is covered. The description adds genuinely new context: no sign-in required and no personal data involved, plus the fact that each entry carries an availability status (available vs in development), which tells the agent what to expect in the payload.

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?

Three compact sentences with no filler, and the scope statement leads. The ten-item parenthetical is long but earns its place by letting an agent judge topical relevance without a call; it could have been tightened into a list for scannability.

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, read-only catalogue tool with no output schema, the description supplies both the item count and the per-item shape (one-line summary plus availability), and it names the follow-up tool for depth. Nothing needed to call it correctly or interpret the result is missing.

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 the baseline is 4 and there is nothing for the description to disambiguate. It correctly spends no words on parameter explanation and instead describes what each returned item contains.

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 (list) and resource (the ten apps in the NodajiFi ecosystem), then enumerates the exact domains covered, so an agent knows precisely what is inside without opening the schema. It is clearly distinguished from its sibling nodajifi_get_app, which is named as the detail-level alternative.

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?

Explicitly routes the agent: use this for the catalogue overview, then call nodajifi_get_app for languages, links and which tools hold an app's public data. That is a clear selection rule, though it does not state exclusions or when not to bother with the overview at all.

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