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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is covered. The description adds the useful REST equivalence ("same payload as GET /me") and the "live" qualifier, but says nothing about permission requirements, whether the call itself is rate limited, or caching/freshness guarantees.

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?

The first sentence is front-loaded with the payload inventory and the middle sentence carries the key directive. The trailing "Examples: Inspect the authenticated agent identity and limits" adds no information beyond the opening sentence and is a mild waste of tokens.

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-argument, read-only tool with a full output schema and complete annotations, the description supplies enough to call it correctly on its own. The only real omission is disambiguation from the identically-scoped identity and capability siblings.

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 no parameter surface for the description to compensate for. Baseline 4 applies; the enumerated field list is a bonus rather than a parameter clarification.

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?

Uses a specific verb ("Describe") against a precisely scoped resource ("the authenticated agent") and enumerates the payload contents: identity, tier, scopes, capabilities, rate limits, reputation tiers, market-creation capacity. However, it never distinguishes itself from close siblings such as kellian_get_agent_identity, kellian_get_context, or kellian_list_capabilities, whose names overlap heavily with the fields listed here.

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?

"Call this first to self-configure" is an explicit, actionable sequencing directive that tells the agent when to reach for it. There are no exclusions or alternatives named, so the agent must still guess whether kellian_get_agent_identity or kellian_get_context is the right call in a narrower situation.

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