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

Annotations declare readOnlyHint=false, idempotentHint=false and destructiveHint=false, so the description's real value is the privacy and consent contract it adds: voluntary participation, mandatory disclosure, and a prohibition on inferring or submitting personal/confidential data. Somewhat missing is what actually happens on registration, e.g. whether passing an existing client_id re-registers or updates the record, which matters given idempotentHint=false.

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 tightly packed sentences with no waste; the optionality and consent precondition are front-loaded before the privacy prohibition.

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?

Annotations and the output schema cover safety and return semantics, and the consent protocol is well specified, but with 6 parameters at 17% schema coverage the description leaves the agent guessing about five fields it is told to disclose to the operator.

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 only 17% – just consent_to_store is documented. The description tells the agent to 'list the fields to be stored' but never enumerates them or explains use_case, user_type, agent_client, home_district_cds, or the meaning/format of client_id, so an agent cannot tell whether to supply a pre-existing client_id or omit it.

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: registering 'this MCP installation' with the SACS service, and flags that it is optional. It is clearly distinguishable from the sibling tools, which are all read-only data query tools, though the description never explicitly says so.

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 an explicit precondition sequence: disclose that registration is voluntary, confirm data access works without it, list stored fields, and obtain consent before calling. The 'before calling' framing plus the optionality statement effectively answers when and when-not to call, with no sibling alternative needed since none exists.

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