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

Annotations already declare this is a non-destructive mutation, and the toggle described is consistent with that. The description adds no further behavior: nothing about idempotency, permissions, or what happens to already-redeemed or in-flight redemptions when a reward is deactivated.

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 with the action front-loaded. 'Based on analytics' is a slightly vague justification clause, but overall there is no wasted text.

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 two-parameter status toggle with full schema documentation and annotation-covered safety, the description is nearly sufficient. Only the side effects of deactivating a reward are unstated.

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% and both parameters are documented in the schema (is_active semantics, reward_id as UUID). The description adds no format, constraint, or edge-case detail beyond that, so the baseline 3 applies.

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 pair (activate/deactivate) plus the resource (a reward in the catalog), which separates it cleanly from create_reward, list_rewards and redeem_reward. It does not explicitly name those siblings, but the action is unambiguous.

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 to manage reward availability based on analytics' implies the intent but gives no concrete when/when-not conditions and never contrasts the tool with redeem_reward or create_reward. The agent must infer that this only toggles status rather than performing redemption.

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