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

Annotations already declare readOnlyHint=false, idempotentHint=true, and destructiveHint=false; the description adds real value beyond them by disclosing the create-or-reuse semantics and the side effect of setting the connection as default (only when no default exists). It also notes plan coverage and contradicts nothing. It stops short of discussing permissions or how the default is chosen if multiple connections exist.

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?

Four sentences, all functional, with the core action and the reuse/default behavior front-loaded. The plan-coverage sentence ("Works on every plan, including the FMEPM Demo plan") is the least essential but still answers a plausible gating question.

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 parameterless, non-destructive setup tool, the description covers the action, its side effects (default promotion), idempotency behavior, plan eligibility, and even what it returns (ready-made prompts) despite no output schema. An agent has everything needed to call it 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?

The tool takes zero parameters, so there is nothing for the description to disambiguate; baseline is 4. Annotations and an empty schema already define the call shape.

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 states a concrete verb+resource (creates the demo EPM connection with sample data) and adds the key nuances: reuses it if it exists, and promotes it to default when none is set. It also clarifies this is the Vision sample app with no real Oracle pod, which distinguishes it clearly from connect_epm_environment.

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 it when the user has no connection yet and wants to try the connector before adding a real Oracle EPM pod" is an explicit usage condition with the exclusion implied (user already has a real pod). It doesn't name connect_epm_environment directly as the alternative, so the routing guidance is clear but not fully explicit.

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