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

Annotations already declare the safety profile (readOnlyHint=false, idempotentHint=true, destructiveHint=false), so the description's main value-add is the 'current session' scoping, which is genuinely useful. It does not say whether the setting persists beyond the session, what the default is when policyPreset is omitted (the parameter is optional), or what confirmation the caller receives.

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 compact sentences with the purpose front-loaded and a concrete call example appended; nothing is wasted. The example is arguably padding given a 100%-covered single enum, but it aids orientation for a tool whose name is misleading.

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 one-parameter, non-destructive, idempotent config tool with no output schema, this is close to sufficient. The remaining gaps—meaning of the three presets and behavior when the optional parameter is omitted—are exactly the things an agent needs to pick a value confidently.

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 100% and the enum values are visible, so the schema carries the parameter documentation and a baseline 3 applies. However, neither the schema nor the description explains what 'read-only', 'dry-run-first', or 'standard' actually do in practice, which is the one piece of meaning a description could uniquely add here.

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 specific verb and resource: 'Configure the active Safe-Writes Policy preset ... for the current HighLevel agency session', which clearly separates it from the audit/health siblings. The only weakness is that the tool name ('tools_enable') reads like it enables tools, so the description is doing the work of correcting a misleading identifier rather than reinforcing it.

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?

An example invocation shows the intended call shape, and the phrase 'current HighLevel agency session' implies scope, but there is no explicit when-to-use vs when-not guidance and no routing to siblings such as ghl_agency_doctor or ghl_agency_contexts. The agent must infer that this is the setup step rather than a diagnostic one.

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