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

The phrase 'full update' hints at a replace-semantics behavior, which is a useful trait beyond the annotations, but it does not explain consequences such as whether unspecified fields are cleared, whether the operation is idempotent, or what happens if the security does not exist. With only openWorldHint=false and destructiveHint=false annotations, the description carries most of the behavioral burden and falls short. The term 'holding' also obscures rather than clarifies the entity being modified.

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?

The description is one short sentence, so it is concise, but it mostly restates the tool name and adds little value beyond the word 'full'. It lacks the structural clarity that would come from separating purpose, usage, and behavior. The sentence is not bloated, but it also does not earn its place meaningfully.

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 highly complex tool with a 30+ field nested security object and no property descriptions, a one-sentence description is severely inadequate. There is no information on which fields are updatable, how the update interacts with existing data, what the response contains, or how to handle partial input. Even though an output schema exists, the input complexity demands far more contextual guidance.

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 0%, and the description does not compensate by explaining any of the many fields in the security object. There is no mention of required fields, field types, or how fields like safeType, instrumentType, or vesting should be structured. Agents must rely entirely on the raw schema, which lacks semantic descriptions for most properties.

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 ('applies a full update') and a resource ('a holding'), so the core action is clear. It does not explicitly differentiate from sibling update tools like cap_table_update_cap_table_agreement or cap_table_update_cap_table_stakeholder, but the name and title make the target resource evident. The term 'holding' is slightly ambiguous, but not misleading enough to lower the score further.

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?

No guidance is given about when to use this tool versus other cap_table update tools or alternatives such as delete_cap_table_security or get_cap_table_security. There is no mention of prerequisites, such as having an existing security, nor any indication about partial vs. full replacement behavior beyond the word 'full'. The description leaves all usage decisions to the agent with no explicit context.

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