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

With no annotations, the description carries the full burden. It does disclose two valuable behaviors: existing trust and consent are never reset (destructive-safe upsert semantics), and a new relationship yields a one-time owner key (a non-retrievable side effect the agent must capture). It omits auth/permission requirements, whether any state is mutated on re-observation, and rate limits.

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 short, front-loaded sentences with no filler, and the most important constraint (trust/consent are never reset) appears early. It is efficient, though the extreme terseness for an 8-parameter onboarding tool trades away useful detail.

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 tool with 8 parameters, zero schema coverage, no annotations, and no output schema, the description is too thin. It never defines what a 'kind' is, what capabilities/needs/protocols represent, or what the consent flags control, leaving the agent unable to populate the payload correctly.

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 0% across 8 parameters, and the description explains none of them. Critical fields like kind, needs, protocols, capabilities, identity_uri, and the two consent_* booleans are left entirely undocumented, forcing the agent to guess at valid values and intent. The mention of 'owner key' refers to an output, not a parameter.

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 and resource: 'Create or re-observe a relationship.' The upsert nature is clear and the mention of a one-time owner key hints at the tool's role in onboarding. It does not, however, distinguish itself explicitly from siblings like aether_identity or aether_relationship_status, leaving the agent to infer boundaries.

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 explicit when-to-use guidance and no alternatives are named. The agent is not told whether to call this before aether_relationship_status, how it relates to aether_set_contact_consent, or under what preconditions introduction is appropriate. Only the implicit 're-observe' hint suggests idempotent re-invocation.

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