update_user_profile

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

Annotations already declare write, idempotent, non-destructive, closed-world. The description adds genuine context beyond them: cross-session persistence, the fact that it need only be set once, the 2000-char limit, and content-quality expectations (behavioral instructions, not a bio). It stops short of describing failure modes or validation behavior.

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?

Front-loads purpose and trigger, then condenses format rules into dense but non-redundant sentences. The trailing '(User persona context update.)' repeats the title and could be cut, but overall it is efficient for a tool with this much behavioral guidance.

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 and only two params, the description covers purpose, timing, persistence, format, and limits adequately. It omits what a successful call returns and whether omitted accountContext persists, which is a minor gap.

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 coverage is 100% so the baseline is 3, but the description adds format and content guidance beyond the schema: one identity sentence plus numbered directives, and the four categories to cover (evidence priority, framing, geography, output structure). This meaningfully shapes how the agent fills userContext.

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 (save/update) and resource (user's research profile) plus the downstream effect on response relevance. No sibling tool does anything similar, so the agent can identify it unambiguously from the name and opening sentence.

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?

Gives a clear trigger ('Call this after you understand the user's role, industry, and research needs') and clarifies repeat behavior ('only need to set it once, then update if their focus changes'). No explicit exclusions or alternative tools are named, but none are needed given no functional sibling.

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