Question about WebMCP and declarative API

[Raymond Camden]

While looking at the docs for the declarative API (https://docs.google.com/document/d/1rtU1fRPS0bMqd9abMG_hc6K9OAI6soUy3Kh00toAgyk/edit?tab=t.0#heading=h.yslvlvxa9khg), one thing seems a bit odd. I get why adding attributes to the form tag could be useful for 'announcing' that the form element is a tool, but why do we need additional parameters at the field level? Shouldn't the field names and associated labels (if used of course) provide that info? 

[François Beaufort]

Hey Raymond,

While the browser tries to infer as much as possible from standard HTML, these extra parameters provide a "contract for interaction" that reduces hallucination and ensures the agent knows exactly how to interact with your page features.
Those HTML form elements attributes are not mandatory though. Sometimes `toolname` and `tooldescription` are all that's required.

On Tue, Feb 10, 2026 at 4:56 PM Raymond Camden <raymon...@gmail.com> wrote:

While looking at the docs for the declarative API (https://docs.google.com/document/d/1rtU1fRPS0bMqd9abMG_hc6K9OAI6soUy3Kh00toAgyk/edit?tab=t.0#heading=h.yslvlvxa9khg), one thing seems a bit odd. I get why adding attributes to the form tag could be useful for 'announcing' that the form element is a tool, but why do we need additional parameters at the field level? Shouldn't the field names and associated labels (if used of course) provide that info? 

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[Raymond Camden]

Thanks for the reply. As a quick aside, I apologize, I did read but rather quickly, and missed that the input elements name is used by default, and the associated label is used as well. It does exactly what I think I should - and I should not read specs before coffee. 

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Raymond Camden

Email : raymon...@gmail.com
Blog : www.raymondcamden.com