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

readOnlyHint=true already tells the agent this is a safe read, so the burden is lower. The description adds value by naming the underlying endpoint (GET /assets/<ASSET#>.api) and roughly what fields are returned, but gives no auth requirements, error behavior, or detail on what 'details' means.

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?

A single front-loaded clause that leads with the resource and scope, backed by the endpoint. It is a sentence fragment rather than prose, but nothing is wasted.

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 simple single-record read with fully documented parameters and no output schema, the description covers what is fetched and what optional extras exist. Only marginal gaps remain (no field-level return detail, no error/missing-asset behavior).

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%, including the asset_number pattern and a pointer to ezrentout_list_assets, so the schema carries the parameter semantics. The description only echoes that service details and custom fields are optional inclusions, adding little beyond what the booleans already say.

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 and resource ('One fixed asset by its asset number') and enumerates what comes back (details, group, location, status, rental prices). It implicitly distinguishes itself from the plural siblings (list_assets, filter_assets, search_assets), though it never names them.

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?

Usage is only implied: fetch a single asset when you already have its asset number. There is no explicit guidance about when to use this versus get_asset_history, get_asset_booked_dates, get_asset_stock, or search_assets, and no prerequisites stated.

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