OpenPanel: Identify user

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

The annotations already declare this as a write operation that is non-idempotent and destructive, so the agent knows the safety profile without the description. The description adds no behavioral context beyond that: it does not say whether an unknown profile_id creates a new profile, what data could be overwritten when properties are set, or what the destructive aspect actually refers to. For a destructive mutation, that silence is a real gap even with annotations present.

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 short sentences, front-loaded with the action and followed by the situational hint; there is no filler. The bracketed "[UNIFIED]" tag is the only wasted token and briefly risks confusing the agent about a second variant.

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 8 parameters, zero schema descriptions, no output schema, and a destructive flag, the definition should explain identity semantics, property format, and return behavior. Instead it provides a single generic clause, leaving the agent unable to call this correctly without inspecting the schema and guessing formats.

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, so the description carries the entire burden and largely fails it: site, email, client_ip, user_agent, first_name and last_name are never mentioned, and the `properties` parameter is described as a string with no indication it is JSON-encoded or what keys it accepts. Only the vague notion of "profile properties" maps to any parameter at all, leaving most semantics to guesswork.

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?

"Identify a user and set their profile properties" gives a specific verb and resource, so the agent knows this is an identify/upsert operation rather than a read. It does not, however, distinguish itself from the sibling openpanel_set_user_properties, which sounds like overlapping functionality, and the unexplained "[UNIFIED]" prefix adds no meaning.

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?

"Use this to associate events with users" implies a usage context (tie subsequent events to a person), which is more than nothing. But there is no guidance on when to prefer this over openpanel_set_user_properties, no statement about what happens if the profile already exists, and no prerequisites such as needing to call openpanel_create_client first.

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