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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety bar is low; the description still adds real value by noting 'no signature' (implying other tools require one) and that results can be caller-dependent. What is missing is any note on visibility/authorization scope for arbitrary accounts.

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?

Two tight sentences: the operation and its returned fields come first, then the read-only/no-signature note, then the optional caller nuance. No filler or repetition of the tool name.

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 compensates by listing the returned fields and covering both parameters plus the read-only nature. It is nearly sufficient for a 2-parameter read tool, though it does not address error cases (e.g. nonexistent or non-public accounts).

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 100%, so the structured fields already carry the baseline. The description goes further by reframing `caller` as 'the account whose view to read (for caller-dependent results)', which clarifies intent beyond the schema's 'Optional account address (SS58) to run the query as'.

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 gives a specific verb+resource (get an account's public messaging settings) and enumerates the returned fields (username, interests, inbox fee, last update), which is far more concrete than the bare title. It implicitly separates itself from the write-side sibling geode_messaging_update_settings via 'Get' and 'Read-only', but never names an alternative explicitly.

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?

It states the tool is read-only and needs no signature, which implies when it is safe/appropriate to call, but there is no explicit when-to-use versus alternatives such as geode_messaging_get_my_inbox or geode_messaging_update_settings. Usage context is implied rather than stated.

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